# 90 Minute Timer

> 90 minute timer for ultradian work cycles, sports halves, and long study sessions, with alarm at zero. Free, runs locally in your browser, no signup required.

- **Canonical URL:** https://boringtoolskit.com/ninety-minute-timer/
- **Category:** Timers
- **Evidence level:** catalogue
- **Reviewed:** July 26, 2026
- **Last verified:** 2026-10-13
- **Privacy:** Inputs and results stay in this browser unless the page clearly labels an external request.

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