HIIT Timer — 50/10
8 rounds · 50s work / 10s rest · 8m. Runs in the browser with color-coded phases and beeps; the screen stays on. Free, no sign-up.
Get Ready
0:10
Next: Work · 0:50
8:10 left
Palette
Space start / pause R reset M mute F fullscreen
How it works
Fifty on, ten off — a 5:1 grind with barely any recovery. Very little recovery between efforts.
- 50 seconds of hard work
- 10 seconds of active or full rest
- Repeat for 8 rounds
- Mix movements or hold one — the timer just keeps the intervals honest
Work
50s
Rest
10s
Rounds
8
Total
8m
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 — 60/30
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30-Minute HIIT Timer
30 rounds · 40s / 20s · 30 min
HIIT Timer — 15/15
20 rounds · 15s work / 15s rest · 10m
HIIT Timer — 20/20
15 rounds · 20s work / 20s rest · 10m
Tabata Timer
8 rounds · 20s work / 10s rest · 4 min