This literature review describes Type 2 diabetes applications with regard to purpose, effect, preferences and possibilities. Diabetes apps might have a positive effect on the health of a person with diabetes. Some studies have found improve-ments in HbA1c, body weight and health behaviour. Important is to personalise diabetes apps to the target group and involve the group actively in the development and testing of the app. More research on how diabetes apps can be implemented in the healthcare system is crucial. Current research is characterised by methodological challenges.