The Fitness Age app requires access to a user's Health data (specifically Cardio Fitness, Biological Sex, Date of Birth) in order to calculate Fitness Age, Relative Age and Percentile. This data is stored on device, and never leaves the user's control. I, Jeremy Somerville, do not collect, save, use, process or have access to this data.
If you have any questions regarding your data and it's use please contact me at jeremy@jeremysomerville.com.au