HIIT Timer — 15/15
20 rounds · 15s work / 15s rest · 10m. Runs in the browser with color-coded phases and beeps; the screen stays on. Free, no sign-up.
Get Ready
0:10
Next: Work · 0:15
10:10 left
Palette
Space start / pause R reset M mute F fullscreen
How it works
Fifteen seconds of work and fifteen of rest, twenty rounds: ten minutes at a 1:1 ratio with short efforts.
- 15 seconds of work
- 15 seconds of rest
- Repeat for 20 rounds
Work
15s
Rest
15s
Rounds
20
Total
10m
Guide: How many rounds of HIIT? Work-to-rest ratios and rounds
Pulse for iPhone and Apple Watch
The same kind of timer as an app. Free download; Pulse Pro is $3.99 once. No subscription, no ads.
168 palettes8 free, all 168 with Pro.
Apple WatchSaved interval timers run on the watch, with a haptic at each transition.
Live ActivityThe countdown shows on the Lock Screen and in the Dynamic Island.
Saved timers3 free, unlimited with Pro. Flow sessions, labels and history.
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HIIT Timer — 45/15
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HIIT Timer — 30/15
10 rounds · 30s work / 15s rest · 7m30s
Tabata Timer
8 rounds · 20s work / 10s rest · 4 min