You

Profile

Sessions

Time

Sets

Streak

Body

Calories

A rough estimate. Not medical advice. Pick a mode and don’t overthink it.

AgeSexHeight cmWeight kg

Activity

MAINTAIN

2,740 kcal

Maintenance around 2,740 kcal. Use this as a starting point.

History Timer

Appearance

Hide exercise info

Strip the workout down to names and numbers.

Rest timer

Count down after a set.

Sounds

Ding when rest or rounds finish.

Vibration

Haptic pulse on timer completion.

Boxing grace period

30-second ready count before a round.

Show templates

The free programme library. Turn off if you don’t want them.

Weight incrementOpening voice

Kazurai

Version 1.3.6

App updates replace code only — workouts, logs, and settings stay on this device. Data is only lost if you clear the browser or delete the home-screen app.

Feedback

Tell us what you want changed.

Support Kazurai

Kazurai is free because fitness should be. No subscription. Only support if you can afford to.

Support KazuraiBuy us a coffee on Ko-fi.

Backup

Updates never wipe your logs. Export a .json file if you buy a new phone or switch devices, then import it there.