90 Minute Timer

A 90-minute focus timer aligned with your ultradian rhythm — the natural 90-minute cycles your body moves through during the day. This is the gold standard for deep, creative work.

How to Use This Timer

1. Decide on one task to focus on
2. Press start and work until the timer chimes
3. Take a break when the session ends
4. Repeat as needed throughout your day

Use the theme switcher to pick an ambient background, and the speaker icon to toggle the completion chime.