Root Interval Timer

Plan a work and rest interval session with Root Interval Timer. Set the work duration, rest duration, number of rounds and a preparation countdown, then start your session.

A focused timer
- Follow the current phase, remaining time and round.
- Pause and resume the current session, or stop it when you need to.
- Finish after the last work round, without an extra final rest.

Your recent sessions
- Review up to 20 completed session records stored on this device.
- Reuse settings from a completed record.
- Keep your last timer settings for the next session.

The core timer and local records work offline. English and Korean interfaces and light and dark themes are available. No account is required for the timer.

This is an interval timing tool. It does not measure exercise performance or provide medical advice. Interrupted sessions may need your attention before you continue; background behavior depends on device and system conditions.

Root Interval Timer is not a medical device and does not diagnose, treat, cure, or prevent any medical condition. Consult a healthcare professional for medical advice, diagnosis, or treatment.