Height and weight in your profile can be entered in either metric or imperial units.
Setting units
In Settings → Profile Configuration:
Height: enter the value, then tap the unit selector to choose cm, m, ft, or in
Weight: enter the value, then tap the unit selector to choose kg or lbs
Units are saved per value — you can use cm for height and lbs for weight if that's how you think about it. We don't judge.
Does it affect the routine?
Not really — the AI normalizes internally. Units are for your convenience when entering and reviewing your profile.
Workout display
Timers show in seconds and minutes (universal). Rep counts are just numbers. There's no unit system for workout playback.