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Build HIIT sequences phase by phase. Chrono walks work and rest for you so you can keep intensity without watching a phone.
Quick answer
HIIT Timer on Chrono Timer: Build HIIT sequences phase by phase. Chrono walks work and rest for you so you can keep intensity without watching a phone. Free on iautre.com — no account, works offline.

Use hours, minutes and seconds — or tap a quick preset below the display.
Hit play or press Space. The countdown keeps running if you switch tabs.
When time is up the alarm rings, with an optional notification and confetti.
A hiit timer is an online countdown (or pomodoro/interval) tuned for fitness workflows—clear display, alarm when time is up, and presets that match how people actually work.
Yes. Chrono Timer’s hiit timer on iautre.com is free, with no ads and no account. Settings stay in your browser.
Yes. After the first visit, Chrono works as a PWA offline—useful for classrooms, travel, and flaky Wi‑Fi.
Fully—backgrounds, clock styles, fonts, colors, ambient sounds, and saved themes. Make it match your desk or classroom display.
Chrono Timer
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