How biological age is measured in Berlin
fjt reads four signals from everyday life in Berlin: steps and movement, sleep duration and regularity, perceived stress, and nutrition including alcohol and caffeine. These map onto established ageing markers and collapse into one score.
No wearable required — your phone is already with you, so measurement starts on day one and updates daily.
Lifestyle factors specific to Berlin
Berlin winters cut daylight sharply, which shifts sleep rhythm and mood. fjt adds light exposure to your check-ins so the seasonal dip becomes visible.
Lowering your biological age in 30 days
Anchor your bedtime: keep weekday and weekend within 60 minutes of each other.
Aim for 7,000–8,000 steps, spread across short walks around Berlin.
Finish dinner at least three hours before sleep.
Add two resistance sessions a week and five minutes of breathwork daily.