Digital health technology, especially digital and health applications (‘apps’), have been developing rapidly to help people manage their diabetes. Numerous health-related apps provided on smartphones and other wireless devices are available to support people with diabetes who need to adopt either lifestyle interventions or medication adjustments in response to glucose-monitoring data. However, regulations and guidelines have not caught up with the burgeoning field to standardise how mobile health apps are reviewed and monitored for patient safety and clinical validity. The available evidence on the safety and effectiveness of mobile health apps, especially for diabetes, remains limited. The European Association for the Study of Diabetes (EASD) and the American Diabetes Association (ADA) have therefore conducted a joint review of the current landscape of available diabetes digital health technology (only stand-alone diabetes apps, as opposed to those that are integral to a regulated medical device, such as insulin pumps, continuous glucose monitoring systems, and automated insulin delivery systems) and practices of regulatory authorities and organisations. We found that, across the USA and Europe, mobile apps intended to manage health and wellness are largely unregulated unless they meet the definition of medical devices for therapeutic and/or diagnostic purposes. International organisations, including the International Medical Device Regulators Forum and WHO, have made strides in classifying different types of digital health technology and integrating digital health technology into the field of medical devices. As the diabetes digital health field continues to develop and become more fully integrated into everyday life, we wish to ensure that it is based on the best evidence for safety and efficacy. As a result, we bring to light several issues that the diabetes community, including regulatory authorities, policymakers, professional organisations, researchers, people with diabetes and healthcare professionals, needs to address to ensure that diabetes health technology can meet its full potential. These issues range from inadequate evidence on app accuracy and clinical validity to lack of training provision, poor interoperability and standardisation, and insufficient data security. We conclude with a series of recommended actions to resolve some of these shortcomings.
Coincident with the diabetes pandemic of the last three decades has been a revolution in digital and wireless technology . These technological advances have been harnessed to support lifestyle and pharmacological interventions, as well as medical devices (blood glucose meters, continuous glucose monitoring [CGM] devices, insulin pumps and smart pens) [2,3,4,5]. At the forefront is the burgeoning field of digital health technology, notably digital health apps, for people with or at risk for diabetes, which has proliferated and begun to permeate clinical care, research and health product development .
This position statement focuses on digital health apps. Digital health, also known as mobile health (‘mHealth’), is defined by the WHO Global Observatory for eHealth (GOe) as ‘medical and public health practice supported by mobile devices, such as mobile phones, patient monitoring devices, personal digital assistants (PDAs), and other wireless devices’ . Digital health apps can be generally broken down into three categories: those used for tracking wellness, those that function as stand-alone medical devices (e.g. for titrating insulin), and those that display, download and/or use data from medical devices that diagnose, prevent, monitor or treat a condition (e.g. blood glucose monitoring [BGM], CGM, insulin pump or automated insulin delivery [AID] system [also known as ‘closed loop’ control system]) . Among almost half a million health-related apps available for wireless devices (usually smartphones) [9–10], apps designed to help manage diabetes are among those most commonly available . These are intended to improve health outcomes and quality of life by coaching people with diabetes, supporting healthy nutrition and weight control, encouraging glucose monitoring and remote monitoring, assisting with the interpretation of results, maintaining lifestyle modifications, guiding medication dosing and, ultimately, reducing complications . Due to the vastness of the field of digital health apps, this position statement will go into discussion of only stand-alone apps that are not integral to a regulated medical device. Examples of what is out of scope of this position statement include insulin pumps and AID systems.
Table 1 lists examples of digital health apps used for managing diabetes according to their intended purpose. It is important to note that many of these apps have more than one feature, and not all are solely for managing diabetes. Earlier in 2019, Kebede and Pischke conducted a study that aimed to identify the most popular diabetes apps via a web-based survey among people with diabetes on social media .
Diabetes apps have enormous potential, given that more than 2.7 billion individuals in the world use smartphones  and about 0.5 billion people already use mobile apps for diet, physical activity and chronic disease management . Small-scale studies of digital programs targeting glucose control, medication adherence, weight loss and quality of life have shown promising results [27,28,29,30]. However, longer-term clinical evidence is needed to more accurately assess the effectiveness of diabetes apps. Currently, many apps are ‘stand alone’; however, there is an increasing trend towards integration and increased automation (both in data collection and algorithm-based response). As this trend gains momentum, the landscape of apps is likely to be transformed towards greater integration.
The market-driven explosion of health apps has been facilitated by current systems of regulation. However, not every app is useful or good. Our intention is not to slow growth, but, rather, to make a realistic assessment of what is safe and truly beneficial for people with diabetes. There are very few data on long-term benefits, and even high-quality short-term data are limited . While apps may benefit those with the technical, literacy and numeracy skills to interact with them, many people with diabetes (even in high-income countries) still lack access to healthcare and medications (including insulin) required to sustain life, which may represent more pressing problems to address.
The Diabetes Technology Working Group of the American Diabetes Association (ADA) and the European Association for the Study of Diabetes (EASD) aims to complement already published reviews, position statements, and guidelines on digital health apps [32,33,34,35] by reviewing their benefits and risks while providing approaches to handle the challenges they pose. In the remainder of this article, we cover only stand-alone diabetes apps, as opposed to those that are integral to a regulated medical device (e.g. insulin pump, CGM system, AID system). Other topics not covered here that warrant future attention are apps specific to gathering clinical evidence, and apps that support general electronic medical record (EMR) systems.
The role of regulators
While most stakeholders in Europe and North America have a general understanding of the approval and regulatory processes governing pharmaceuticals and medical devices, our experience is that levels of awareness of these issues in relation to digital apps are lower. We believe it is important for people with diabetes, as well as healthcare professionals (HCPs), to understand aspects of diabetes app regulation.
European Medicines Agency (EMA)
The European Commission has recognised the growing digital health market. In 2012, it released guidance (updated in 2016) on the qualification and classification of stand-alone software used in the healthcare setting as a medical device . Under this guidance, mobile apps are considered medical devices if they are used ‘specifically for diagnostic and/or therapeutic purposes’, including the diagnosis, prevention, monitoring, treatment or alleviation of disease. In 2014 (and updated in 2018), the Communication on Digital Transformation of Health and Care in the Digital Single Market was published, listing three priorities :
Enable citizens to access their health data across the European Union (EU);
Allow researchers and other professionals to pool health data across the EU to advance research and personalised health; and
Use digital tools to empower people with diabetes to look after their health, prevent diseases and enable feedback and interaction between users and HCPs.
While the European authorities and the US Food and Drug Administration (FDA) share the broad principles of regulating both traditional health products and software, there are substantial differences in the organisational structure of medical product and software registration. The EMA and the FDA are each responsible for pharmaceutical regulation, but only the FDA regulates both pharmaceuticals and medical devices. In the EU, no single agency but the European Commission is responsible for regulation of medical devices; each individual country retains primary responsibility for organising and delivering health services and medical care. As a result, EU member states maintain their own national pharmaceutical regulatory authorities, with the European Commission serving to complement national policies and ensure health protection according to EU policies (e.g. the new Medical Device Regulation [MDR]) . Instead, these responsibilities are retained by individual member states, which delegate to accredited notified bodies responsibilities for implementing these regulations. These entities are accredited by the EU to assess whether a product meets the standards set by the EU Medical Devices Directive (MDD), and their decision is valid across all member states. Assessments are based on evidence of safety and performance (in contrast, the FDA may also require clinical effectiveness data, especially for ‘high risk devices’ (see classification of medical devices in ) . If these standards are met, then a manufacturer is authorised to market the product throughout the EU and label it with the Conformité Européenne (CE) mark .
In general, the process of obtaining a CE mark in the EU in the past has been a lower hurdle than obtaining device approval or clearance by the FDA . This difference between the USA and EU is likely to narrow with the implementation of the European Union’s MDR, which repeals the existing directives on medical devices. The regulation was published on 5 May 2017 and allows a transition time of 3 years before coming into force on 25 May 2020. Currently approved medical devices will have up to 26 May 2020 to meet the new MDR requirements. Among the provisions in this set of regulations are the strengthening of post-market surveillance, establishment of a comprehensive EU database on medical devices, stricter control for high-risk devices before launch in the marketplace, and a new risk classification system for in vitro diagnostic medical devices in line with international guidance .
The guidelines in individual countries align with those issued by the European Commission. For example, Sweden’s Läkemedelsverket Medical Products Agency classifies medical software as a medical device if its stated purpose complies with the definition in Article 1 of Directive 93/42/EEC on medical devices (‘used specifically for diagnostic and/or therapeutic purposes’), has a demonstrated benefit over risk, and is CE-marked . In Germany, medical apps are classified as medical devices if they follow EU guidelines and the German Medical Devices Act and are CE-marked . The situation in the UK was previously similar but is currently in flux because of continuing uncertainties about the UK’s relationship with the EU.
More recently, the European Commission has made considerable efforts to introduce and implement the MDR as a new regulatory framework, which will provide clarity on what is (and what is not) a medical device software .
With a view to prioritising its resources in the face of an explosive growth of digital health apps, the FDA has attempted to draw a line between those that do and do not require regulation. In 2015, it released a guidance document (updated in 2019) for mobile medical applications for apps that meet the definition of a device in section 201(h) of the Federal Food, Drug and Cosmetic Act (FDCA) . This definition covers apps intended to be used as accessories to regulated medical devices and those that are stand-alone software. However, the guidance expressed its intention to exercise ‘enforcement discretion’ over those judged to pose a lower risk to users (e.g. apps that provide people with diabetes encouragement to meet their health goals or provide them with tools to track their health information). Thus, using this ‘risk-based’ approach, mobile apps that calculate insulin doses are within the scope of regulation, while apps that simply organise and/or provide health or nutritional information are not. The FDA lists approved/cleared apps in its 510(k) and premarket approval (PMA) databases and on its Registration & Listing Database .
These guidelines were updated when the US Congress passed the 2016 21st Century Cures Act, which specifically excludes from the definition of ‘medical device’ certain low-risk medical software. Examples of exclusions from regulation as a medical device include software that supports administrative functions, encourages a healthy lifestyle, serves as an electronic patient record, assists in displaying or storing data, or provides limited clinical data support [46–47]. By the end of 2019, the FDA will launch version 1.0 of the National Evaluation System for health Technology (NEST) initiative, which will be coordinated by the NEST Coordinating Center (NESTcc) . NEST will improve access to evidence across the total product life cycle of medical devices by strategically and systematically leveraging real-world evidence generated by participating institutions and applying advanced analytics tailored to the unique data needs and innovation cycles of medical devices . Using a neural network data model that will represent nearly 500 million patient records from approximately 200 hospitals and 4000 outpatient clinics, this initiative seems promising for medical device stakeholders, especially if it will capture substantial data on people with diabetes.
An important distinction is the difference in the regulation of mobile health apps from the regulation of digital therapeutics (sometimes referred to as ‘digiceuticals’). Digital therapeutics are clinically validated digital, usually online, health technologies intended to treat a medical or psychological condition . These are governed by clinical data and regulatory approval as for drugs and medical devices. An example is WellDoc’s BlueStar Rx mobile app, which was cleared by the FDA as a prescription-only app to support the management of type 2 diabetes. Another version without the bolus calculator, called BlueStar, was approved for direct sale without prescription (i.e. two versions are offered, allowing the company to offer the product through more channels). Both BlueStar and BlueStar Rx analyse diabetes data entered by the patient, comparing past data trends to form personalised guidance and creating a summary of curated data analytics to the healthcare team for clinical decision support, but the non-prescription version will not feature the insulin calculator that the full version does. In essence, digital therapeutics such as BlueStar Rx focus on delivering clinical outcomes and are regulated by the FDA. On the other hand, mobile health apps, especially those that do not provide clinical recommendations, are largely not.
Whether a mobile app has regulatory clearance/approval or not, we believe that all clinical performance claims made by ‘digital health technology’ should be backed by clinical evidence and real-world performance/outcomes. Real-world data and real-world evidence have been increasingly recognised by regulatory bodies, including the FDA, to enhance clinical research and support regulatory decision making for drugs, biologics and devices [51–52], and thus the same should be done for mobile apps. The FDA has published a Digital Health Innovation Action Plan that outlines a reimagined approach to foster digital health innovation while continuing to protect and promote public health . This effort includes three goals:
Providing guidance to provide clarity on the medical software provisions of the 21st Century Cures legislation;
Launching an innovative pilot precertification programme (called the FDA Pre-Cert for Software) to develop a new approach to digital health technology oversight; and
Building expertise within the agency (including recruitment of additional dedicated and specialised staff).
In recent months, the FDA has further developed its Digital Health Software Precertification Pilot Program (Pre-Cert) with the goal of developing a more tailored pathway that enhances safety and effectiveness of such devices while supporting the innovation and availability of high-quality digital health tools. This programme will allow the FDA to first look at the company, rather than primarily at the digital health software product being submitted, in order to expedite product reviews from vetted ‘excellent’ companies . The components of the Pre-Cert programme are:
Excellence appraisal and certification: Evaluating organisational excellence based on five criteria for quality and organisational excellence principles: (i) product quality, (ii) patient safety, (iii) clinical responsibility, (iv) cybersecurity responsibility, and (v) proactive culture.
Review determination: A risk-based framework for pre-certified organisations is to be established to determine the premarket review pathways for their products. Incorporating principles from the International Medical Device Regulators Forum (IMDRF)’s Software as a Medical Device (SaMD) (discussed in the next section), the final framework for each SaMD will be based on the state of the healthcare condition addressed, the significance of the information provided to support healthcare decisions, and descriptions of the core functionality and device.
Streamlined review: FDA review of the information received, which is made streamlined because (1) and (2) provide information that does not need to be submitted again.
Real-world performance: Post-launch product-monitoring efforts on product-specific real-world performance analytics (RWPA). RWPA will consist of real-world health analytics (RWHA: human factors and usability engineering, clinical safety and health benefits), user experience analytics (UXA: user satisfaction, engagement, feedback channels and issue resolution) and product performance analytics (PPA: cybersecurity and product performance; data to be collected by the respective company) .
The current pilot Pre-Cert programme, which remains in a test plan phase, includes nine software companies (Apple, Fitbit, Johnson & Johnson, Pear Therapeutics, Phosphorus, Roche, Samsung, Tidepool and Verily), seven of which have software relevant to diabetes. In 2019, the FDA will test the effectiveness of the Pre-Cert programme by reviewing a number of SaMD products under a traditional de novo pathway and, in parallel, a Pre-Cert pathway to see if the agency gets the same result .
Guidance from other bodies
The IMDRF, founded in 2011, is a group of international medical device regulators whose goals are to build on the work of the Global Harmonization Task Force (GHTF) and accelerate medical device regulatory harmonisation and convergence . Members include officials from the FDA, European Commission, Australian Therapeutic Goods Administration (TGA), Chinese National Medical Product Association (NMPA) and Russian Federal Service for Surveillance in Healthcare (Roszdravnadzor).
The group has released several influential documents. Among them is one released in 2014 that introduces a foundational approach, harmonised vocabulary, and general and specific considerations for manufacturers, regulators and consumers to consider in the context of SaMD . In 2015, the group published another document to help manufacturers and regulators attain a common understanding and vocabulary for the application of medical device quality management system requirements for SaMD . In 2017, the IMDRF published guidance on gathering evidence for clinically meaningful SaMDs, elaborating on valid clinical association, analytical validation and clinical validation . These efforts on the global harmonisation of medical device regulatory processes, including those governing digital health technology, provide guiding principles as a template for other regulatory agencies to incorporate into their respective frameworks.
In 2018, WHO published ‘Classification of digital health interventions v1.0’ with similar aims of providing governments, technologists, clinicians, researchers and other communities in digital health a shared and standardised language for assessing digital health interventions. The document organises digital health technologies into interventions for clients, HCPs, health system or resource managers, and data services. It also presents health system challenges and digital health interventions to address them. For example, the challenge of HCPs losing clients to follow-up can be addressed by sending alerts and reminders; this intervention is categorised under ‘client communication systems’ . This newly available resource provides several examples of current apps and their uses and, more importantly, a solid framework to underpin future developments in digital technology.
Nationwide healthcare service
At least one nationwide healthcare service now provides a digital health apps certification programme. The UK’s National Health Service (NHS) describes its process, which involves app providers to show evidence that their products pass tests in outcomes, clinical safety, data protection, security, usability and accessibility, interoperability and technical stability . The NHS has so far listed 13 apps that are ‘safe and secure’ for the management of diabetes: Changing Health, GDm-Health, Liva UK, Low Carb Program, mapmydiabetes, Mumoactive, My Diabetes My Way, My Health Fabric, my mhealth: myDiabetes, nujjer, OurPath, Oviva and Sugarmedown . This is the only database dedicated solely to apps approved by a regulatory body of which we are aware.
Issues faced by the diabetes community
Although the rapid growth of digital health apps potentially brings great benefit, because this field is still in its infancy, there are also questions and challenges: for example, how physicians and other HCPs can maintain an adequate understanding of commonly used apps in order to provide guidance to people with diabetes, and how data can be kept confidential and secure.
Below we outline nine major issues that need to be addressed by regulatory authorities, policymakers, professional organisations, researchers, product manufacturers and HCPs.
Availability of evidence
Although there are almost half a million mobile health apps available for download, there are far fewer RCTs, case–control studies and cohort studies that have evaluated whether app-based interventions improve health-related behaviours. One of the reasons there are so few published RCTs of digital health is that a product is never ‘frozen’ in time like a medication; program developers are constantly improving their apps. Even a 3-month RCT is likely to have at least a 2-year timeline from conception to publication; a long period of time in a fast-developing area. What should also be kept in mind is that RCTs on digital health apps, are, by nature, never blinded, so a placebo effect cannot be ruled out. Another reason for the relatively few RCTs is that the typically lower commercial value and shorter life cycles of these products does not support the high cost and time involved in conducting RCTs. As a result, developing apps to be used in medical studies may be a less attractive business model for mobile health app developers.
In 2016, Zhao and colleagues searched for peer-reviewed articles in English, published from January 2010 to June 2015, on app-based health interventions targeted at adult populations. While their initial search returned over 3300 articles, the exclusion of qualitative studies and those in which mobile apps were not the primary intervention tool resulted in a final 23 articles from which primary or secondary outcomes for analysis could be extracted . This small number starkly contrasts with the number of mobile health apps available for download. Of these 23 articles, there were only ten described studies relevant to diabetes management. Four of these ten provided interventions intended to improve lifestyle (e.g. physical activity, weight control and diet control), and three aimed to improve medication management. However, only two actually measured changes during a lifestyle intervention, and only one was specifically targeted at diabetes management. Several of the apps assessed in this study improved short-term adherence and enhanced intervention effectiveness, but many others yielded no effect. Zhao and others concluded that their results provided a snapshot of the current evidence of effectiveness for health-related apps, but large-sample, high-quality, adequately powered RCTs are required.
Similarly, in 2016, Drincic and others reviewed mobile medical apps that were commercially available to people with diabetes in the USA or EU. They found only 14 apps with clinical outcomes data published in peer-reviewed literature or that have been cleared by the FDA in the USA or received a CE mark in Europe. Drincic and others found these apps to positively affect outcomes, such as HbA1c, hypoglycaemia incidence and diabetes self-care measures, in the short term. However, more data and long-term studies are needed .
More recently, a 2018 comprehensive study for the US Agency for Healthcare Research and Quality found only 11 RCTs [clinical vs control] reporting health outcomes among the hundreds of commercially available apps for diabetes self-management. Of these 11 RCTs, only five were associated with clinically significant but small improvements in HbA1c. None of the studies demonstrated improvements in quality of life, blood pressure, weight or BMI. Methodological issues included limited duration (2–12 months), potential confounding by other co-interventions, and inconsistency in the reporting of randomisation, allocation, masking of outcomes assessment and method of analysis in relation to dropouts. None of the studies were considered to be high quality .
Thus, while the available studies of app-based interventions show promise for promoting healthy behaviour and managing complex diseases, such as diabetes, they are extremely limited in both quantity and quality. The studies previously mentioned in this section all report their respectively assessed apps as improving or showing promise in improving short-term outcomes. However, all of these studies also conclude that more rigorous, larger sample and longer-term RCTs are required to distinguish the effect of these apps from possible concomitant effects. In principle, well-designed studies with larger sample sizes and of longer duration are needed to gather and assess evidence of sustainable effectiveness over time.
Adequate information and training
Beyond the field of diabetes, evidence-based apps are available as clinical decision-making tools for HCPs, with a scope that includes disease diagnosis, medical calculators, literature search and reference drug information . With thousands of apps currently being developed and updated, issues arise. These issues include how to keep HCPs up to date with the apps most appropriate to use, how to support people with diabetes to use these digital tools, and how to ensure that using them will result in benefit rather than harm. Although it is important for HCPs to stay up to date on the digital health app landscape, we acknowledge that it is unrealistic for HCPs to meet this expectation on top of their high workload burden. As a result, other stakeholders in the diabetes community should work with and alongside HCPs in addressing this issue.
Accuracy, clinical validity and quality
Because the majority of mobile health apps are not subject to regulation, data for assessment of accuracy, defined as the ability to correctly differentiate patient and healthy cases (the sum of true positive and true negative cases divided by the sum of all cases) , often may not be available. Patient involvement and self-management are the key to diabetes care, but there is a fine line between empowerment and unregulated harm. For example, potentially questionable data and/or medical opinion from a mobile health app can place a burden on a consultation if the information provided does not align with clinical guidelines in disease management .
A number of studies have evaluated the accuracy of mobile medical and health apps, though there are few studies that focus on diabetes health apps. Chavez and others analysed the 89 most popular free English language diabetes apps by each app’s level of engagement, functionality, aesthetics, information and number of diabetes-specific management tasks met. Using the Mobile App Rating Scale (MARS), they found that while this subset of mobile health apps ranked ‘acceptable-good’ in engagement, functionality and aesthetics, they ranked ‘poor-acceptable’ in information, app quality score and app subjective score . Bierbrier and others evaluated the accuracy of 14 smartphone medical calculation apps aimed at internists, including those that calculated the severity or likelihood of liver disease or of having a pulmonary embolism. Of 1240 calculations run on these apps, 98.6% were accurate, with six of the 14 functions assessed as 100% accurate. Although errors were few overall, some were clinically significant. The authors point out that in the absence of regulation, the responsibility for any adverse consequences of using these apps falls on the individual clinician .
In addition, a 2018 study by Lum and others pointed out the need for quality assurance mechanisms for diabetes apps to support people with diabetes. Of the approximately 370 diabetes apps that met the researchers’ criteria for blood glucose self-management (blood glucose level recording; goal setting for blood glucose levels and HbA1c; reminders, alerts, and action prompts; and patient education on hypoglycaemia and hyperglycaemia management), the majority did not provide real-time decision support or situation-specific education on blood glucose self-management. All of these apps recorded blood glucose levels. However, only about a third had goal setting and reminders to measure blood glucose and record HbA1c. Approximately a third of apps alerted users to hypoglycaemia or hyperglycaemia, and only 10% of apps educated users on blood glucose management .
Thus, greater scrutiny is needed to oversee the accuracy, clinical validity and quality of mobile health apps to protect patient safety. Apps that can be used by adolescents or parents for their children, as well as during pregnancy or old age, have to ensure that the advice given is suitable for the target age group. In addition, apps should clearly define the user group.
Another factor that should be considered is the standardisation of language and presentation (e.g. blood sugar, time in range, standard deviation, BMI). Setting standards for how information is presented would lead to fewer errors in translation and interpretation from app to HCP to patient.
Technological issues apply to diabetes digital health apps. These include the maintenance of mobile apps so that they are up to date with the latest technological platforms and operating systems and free of bugs that degrade app performance. App developers need to carefully consider battery usage, input/output ports (e.g. USB port, headphone jack, lightning port), and the impact of inconsistent illumination, mobile device cases, and inconsistent resolution with smartphone cameras . In addition, the speed at which mobile app versions are released or new features are rolled out, as well as the tolerance level of acceptable error within a release, is far greater than those of medical technologies. From the user perspective, this provides greater medical choice in medical apps, but makes it more challenging to find and ensure acceptable performance among many apps of varying quality.
Interoperability and standardisation
Consumers use a variety of mobile technological platforms, including Android and Apple iOS. Android and Apple iOS are the dominant platforms in the US market, with a keyword search for ‘diabetes’ performed in the Apple and Google Play stores in 2017 identifying 246 available apps for Android and 100 for Apple iOS . As of 2012, more than 75% of physicians in the USA use Apple iOS devices . However, where these apps are available for less popular platforms, app developers should ensure they operate consistently to the same standard.
It is also important that data recorded in health apps be easily transmitted from smartphones to other platforms, such as electronic health records for sharing with HCPs. An example is Apple Health, which is a health informatics mobile app that functions as a central repository for health information. Apple Health can be integrated into multiple mobile health and fitness apps on Apple products, and record and share health data . An example of an app integrated with Apple Health is Tidepool Mobile, which can connect to Apple Health and show data from users’ insulin pumps, CGM systems and sources outside of Dexcom devices . Google Fit is an approximate equivalent to Apple Health for the Android platform . Advances in integration and automation of data collection have come far, and we anticipate these advances to continue.
Differences among populations
In 2017, an estimated 12 million people ≥65 years of age and 193,000 people <20 years of age had diabetes in the USA . The differences in these two populations are important because younger populations (usually with type 1 diabetes) are typically more proficient at using smartphones than older populations. Consequently, apps targeted for older people with diabetes must be designed with their expected level of technology proficiency kept in mind. In addition, currently available diabetes management apps may not be available in languages other than English or accessible to people with certain physical or mental disabilities (e.g., colour blindness, blindness, hearing impairment). Furthermore, those from remote regions and areas of extreme socioeconomic deprivation may not have access to smartphone technology. The cost of obtaining and activating a smartphone, not to mention the cost of apps that are not free of charge to download, may be a significant barrier on top of the premium prices paid for most branded diabetes drugs .
To date, app developers have made strides in increasing the durability of benefits by utilising ‘gamification’ to encourage long-term behaviour changes and adherence to diabetes management principles. An example is a patient-engagement programme, in which ‘points’ can be earned for time spent in range for blood glucose measurements and redeemed for pharmacy rebates, HCP visits or other benefits. This approach can also be used to encourage health outcomes ; examples exist within mySugr and Medtronic Inner Circle [77–78]. In addition, United Healthcare launched its Motion program, offering up to $4 per day for beneficiaries who meet activity goals . While gamification can certainly incentivise consumers to better monitor their health, it is not a ‘one-size-fits-all’ solution. Such programs may have the drawback of leaving behind those who are in the most need of help, such as those experiencing socioeconomic deprivation. Furthermore, there is no clear proof that gamification improves outcomes and results in long-term changes in health .
Another potential way to engage consumers, particularly those of older populations, is to involve Centers for Medicare & Medicaid Services (CMS) reimbursement. Reimbursement policies in the USA could include, for example, sharing of health data in place of an office visit or sharing of CGM data.
Appropriate role of HCPs
HCPs play an important role in advancing the use of diabetes mobile health apps. While a mobile health app cannot (and should not) replace an HCP, mobile health apps can certainly supplement and bolster medical practice.
As previously discussed, HCPs need to be supported to stay up to date on the diabetes digital app landscape. The ability to communicate regularly with people with diabetes and monitor their glycaemic data gives HCPs an unprecedented opportunity to monitor and improve quality of care and health outcomes (see text box: Consensus report recommendations).
Role of professional organisations
Professional organisations, such as the ADA and EASD, play an important role in shaping the future of healthcare. In addition to the above-mentioned efforts of WHO and IMDRF to classify digital health technology, issues remain that professional organisations need to address. We believe that the American Medical Association (AMA), the International Diabetes Federation (IDF), and many others can make a greater positive impact on patient populations worldwide in collaboration with WHO and IMDRF (see text box: Consensus report recommendations).
Data security and privacy
Data security is a key aspect in a digital world, especially for medical data. Although diabetes apps primarily permit people with diabetes to monitor their own data and discuss their data with health professionals, safety regarding data security and privacy remains a risk and cybersecurity has to be ensured.
Users may believe that their health data stored in apps are private, but that is often not the case. A 2014 study of diabetes apps for Android smartphones demonstrated that diabetes apps routinely shared information with third parties . Because of the potential adverse impact of sharing sensitive health data, app developers should implement and fully disclose their privacy policies to users. App developers should also allow users to have full control over what data they are willing to share with third parties. Such cybersecurity measures must be implemented to protect privacy and enhance data security so that people with diabetes have adequate privacy protection and are not judged or discriminated against based on their blood glucose levels, adherence to their care, or simply their diabetes diagnosis itself.
People with diabetes have a high need for secure information when viewing their glucose levels and insulin doses on wireless diabetes devices, such as blood glucose monitors, continuous glucose monitors, and insulin pumps. Medical devices are prone to security-breaching attacks; for example, incidents have been reported in which data from insulin pumps were accessed remotely and their function controlled without the knowledge of the user. Although there have been no publicly reported incidents of users being harmed from hacking attacks, such situations have the potential to be life-threatening . Data stored in health data apps should be sufficiently encrypted to prevent serious and malicious attacks.
An example that the cybersecurity regulation of diabetes mobile health apps could follow is the guidance by the Diabetes Technology Society on the ‘Standard for Wireless Diabetes Device Security (DTSec)’. DTSec establishes a high level of assurance that electronic products deliver the security protections claimed by their developers and required by their users. A DTSec-certified product must pass evaluation by a DTSec-approved laboratory and the DTSec Working Group (DWG) before it can be listed under a publicly disclosed DTSec evaluated products list .
Conclusions and outlook
Digital health technology, especially digital health apps, for people with or at risk for diabetes has developed at a rapid pace and become an increasingly common aspect of diabetes care and self-management in certain populations. However, several barriers remain that prevent digital health technology from reaching its full potential to improve diabetes therapies and the lives of people affected by diabetes.
Insufficient evidence (at least from a conventional way of looking at evidence) of clinical validity, effectiveness, accuracy and safety are some of the largest issues that limit the effectiveness of diabetes digital health technology. Furthermore, poor usability resulting from technological issues, interoperability issues and differences among populations is another barrier. This web of interconnected issues cannot be solved by one party alone; rather, commitment from regulators, industry, clinical experts, and funding and patient organisations is needed for the necessary clinical evidence to be gathered.
We outline a list of recommendations for regulatory agencies, manufacturing companies, international and national professional societies, funding bodies, researchers, HCPs and people with diabetes to take into careful consideration. These can be categorised into the following themes:
more systematic and structured guidelines for digital health app development and assessment (1a–c; 3d, e)
improved consistency and accessibility of safety reports and app documentation (2a, b, d)
greater investment in gathering of clinical data to provide evidence on digital health interventions (4a, b; 5a, b)
increased accessibility for all consumer populations to use diabetes mobile apps confidentially and securely (2c, g; 3c)
increased communication and cooperation across stakeholder groups (1d–g; 2e, f; 3a, b, f; 6a–c; 7a–c).
Today’s world of products and services, including digital health apps, is moving towards a market of integration. Apps are converging towards a data-capturing and auto-analysed future with algorithm-based recommendations for users affecting their behaviour and decisions. We envision an ongoing role of the EASD, ADA and other professional medical associations in supporting and expanding the field of diabetes digital health technology in the march to integration and continued automation. We call upon regulatory agencies and manufacturing companies to work urgently and collaboratively with health professionals, researchers and people with diabetes to create an environment in which diabetes can be managed safely and effectively, bringing benefits to all stakeholders and the entire diabetes community.
Automated insulin delivery
Blood glucose monitoring
Continuous glucose monitoring
Standard for Wireless Diabetes Device Security
European Medicines Agency
Food and Drug Administration
Federal Food, Drug and Cosmetic Act
Global Observatory for eHealth
International Medical Device Regulators Forum
Medical Device Regulation
National Evaluation System for health Technology
National Health Service
Precertification Pilot Program
Real-world performance analytics
Software as a Medical Device
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We would like to thank the following for their helpful comments: Adam Brown (Close Concerns), John Buse (University of North Carolina School of Medicine), Danelle Miller (Roche Diagnostics), Laleh Mohajerani (Novo Nordisk), Nick Riggall (LB Talent), Mindy Saraco (American Diabetes Association), David Strasberg (Lee Strasberg Institute) and Craig Stubing (Beta Cell Podcast). We would very much like to thank Jennifer Zhao (Kinexum) for her excellent editorial help.
No funding was received.
No honoraria were received by members of the ADA–EASD Diabetes Technology Committee (AEDTC) for writing this manuscript or associated meetings. Most of the members of the AEDTC work with industry as listed below; however, the industry had no impact on the manuscript and its content.
GAF is Executive Chairman of Kinexum, which advises multiple health-product companies in the fields of metabolism, cardiovascular, oncology and dermatology. He was formerly the Group Leader of the Division of Metabolism and Endocrine Drug Products at the US Food and Drug Administration (FDA). JRP has served on advisory boards for companies manufacturing pharmaceuticals used in the treatment of diabetes but no digital health companies. RMB has conducted clinical trials, consulted or served on the scientific advisory boards for Abbott Diabetes Care, Becton Dickinson, Bayer, Dexcom, Eli Lilly, Johnson & Johnson, Medtronic, Novo Nordisk, Roche Diabetes Care and Sanofi. He receives no personal income from these activities, for all payment goes to the non-profit Park Nicollet Institute. RWH coordinates the German/Austrian DPV initiative, which has been supported by Novo Nordisk, Medtronic, Roche, Boehringer-Ingelheim and Eli Lilly through institutional research grants. RWH did not receive any personal honoraria. ALP has served on advisory boards for Abbott Diabetes Care, Eli Lilly, Merck, Novo Nordisk, MannKind, Lexicon, Sanofi and Zafgen. She has received grant funding from AstraZeneca, MannKind and Dexcom. She has been on the Speaker’s Bureau for Novo Nordisk. LH is partner of Profil Institut für Stoffwechselforschung in Neuss, Germany, and of ProSciento in San Diego, CA, USA. He is a member of advisory boards for Roche Diagnostics, Abbott, Zense and Medtronic.
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This article is being simultaneously published in Diabetologia (https://doi.org/10.1007/s00125-019-05034-1) and Diabetes Care (https://doi.org/10.2337/dci19-0062) by the European Association for the Study of Diabetes and the American Diabetes Association.
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Fleming, G.A., Petrie, J.R., Bergenstal, R.M. et al. Diabetes digital app technology: benefits, challenges, and recommendations. A consensus report by the European Association for the Study of Diabetes (EASD) and the American Diabetes Association (ADA) Diabetes Technology Working Group. Diabetologia 63, 229–241 (2020). https://doi.org/10.1007/s00125-019-05034-1
- CE mark
- Diabetes therapy
- Digital apps
- Digital health technology
- Medical devices
- Regulatory agencies