Kizu
The workout tracker that knows when you need to rest.
Know when you're ready
A single ring blends sleep, HRV, resting heart rate, and training load into one number — so you know whether today is a push day or a rest day before you even open the app.
Rest timers that actually work
Kizu's rest timer schedules a real system alarm — it fires even if you background the app or it gets killed. No more losing track of your rest and guessing.
Train with your friends
See what your friends lifted today, drop a fist bump instead of a like, and keep each other honest — all without leaving your workout.
Make it yours
Eleven themes, from a pure-black OLED look to a full cyberpunk palette. Pick the one that feels like your gym, not someone else's app.
Progress you can feel
Every workout earns XP. Keep your streak alive for a weekly bonus multiplier, and watch your level climb the more consistent you are.
Watch the numbers move
Every set you log builds a chart. Six months from now, you won't have to wonder if it's working — you'll see it.
Know when you're ready
A single ring blends sleep, HRV, resting heart rate, and training load into one number — so you know whether today is a push day or a rest day before you even open the app.
