HIIT Timer — 20/20
15 rounds · 20s work / 20s 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 · 0:20
10:10 left
Palette
Space start / pause R reset M mute F fullscreen
How it works
Twenty seconds on and twenty off, fifteen rounds: ten minutes at a 1:1 ratio. Longer rest than Tabata's 20/10.
- 20 seconds of work
- 20 seconds of rest
- Repeat for 15 rounds
Work
20s
Rest
20s
Rounds
15
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.
Related timers
HIIT Timer
10 rounds · 30s work / 30s rest · 10m
HIIT Timer — 40/20
8 rounds · 40s work / 20s rest · 8m
HIIT Timer — 45/15
8 rounds · 45s work / 15s rest · 8m
HIIT Timer — 30/15
10 rounds · 30s work / 15s rest · 7m30s
HIIT Timer — 20/40
10 rounds · 20s work / 40s rest · 10m
Tabata Timer
8 rounds · 20s work / 10s rest · 4 min