Four practical calculators, a private on-device health log, and straightforward guides covering heart rate, hydration, body metrics, and sleep.
Heart rate
72 bpm
Hydration
6 / 8 glasses
Personal training zones from age and resting pulse.
Daily fluid estimate for your size and activity.
Body mass index and resting energy use.
Bedtimes that line up with 90-minute cycles.
3 practical guides