Among the data collected by fitness wearables and the mobile apps connected to them, there are basic activities such as steps, heart rate, the time you go to sleep or wake up, as well as your consumed calories, weight, or even running routes, which are all of great interest to stalkers or attackers. For example, Clario research has revealed that Strava collects 41.18% of users’ personal data, and MyFitnessPal — 35.29%.
“Health information is definitely among the most private and sensitive data in our lives….