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Simple Alternating Dual Timer
Perfect for HIIT, Pomodoro, cooking, and any interval-based activity.
Free forever for the basics · $2.99 one-time unlocks Premium · No subscription
Alternate between high-intensity work and rest periods automatically.
30s work / 10s restFocus deeply, then take breaks. The perfect productivity companion.
25min work / 5min breakTime multiple cooking stages without juggling timers.
Sear / Rest / ServeStructure your practice with timed intervals for poses or breathing.
Hold / Transition
Set Timer 1 and Timer 2, press start, and forget about it.
The timers automatically switch back and forth until you stop them.
No more tapping "next" or managing multiple apps.
Configure your intervals once. The app remembers your settings.
Lock your device. The timer keeps running with audio alerts.
Clear circular progress bars show remaining time at a glance.
Two independent timers that automatically alternate. 1 second to 60 minutes per timer.
Save your favorite timer combinations. Free includes the built-in HIIT preset; Premium unlocks every built-in preset and lets you create your own.
Share your favorite timer setups via link. Recipients can import with a single tap — perfect for coaches and workout partners.
Define a target number of sets and watch your progress. Get a celebration when you hit your goal.
Choose from 6 notification sounds. Set different sounds for each timer.
Adjust alert volume independently. Perfect for quiet environments.
Haptic feedback when timers complete. Never miss an interval.
Available in English, Japanese, French, and German.
Disable Timer 2 to use as a simple single interval timer.
Download free and use the core dual-timer experience as long as you like. Unlock the full set of pro features with a single $2.99 purchase — no subscription, ever.
14-day Premium trial included on first launch
IntervalTimer Duo is a simple alternating dual timer app. Set two timers and they automatically alternate back and forth - perfect for HIIT workouts, Pomodoro technique, cooking, yoga, and any interval-based activity. Available on iOS and macOS as a universal purchase.
Yes. Download for free and use the two alternating timers, the built-in HIIT preset, and basic alert sounds for as long as you like — no subscription. Premium ($2.99 one-time) unlocks Live Activity, Dynamic Island, the set counter, preset sharing, all 6 sounds, and unlimited presets (including unlocking the other built-in presets).
When you install the app, every Premium feature is unlocked for 14 days so you can try them in real workouts and work sessions. After the trial the basics keep working forever — only Premium features lock until you make the one-time $2.99 purchase. Existing paying customers are automatically recognised.
Yes — Lock Screen Live Activities and Dynamic Island are part of the Premium tier on supported iPhones. You can see your timer progress without unlocking your device, which is especially useful during workouts.
Premium users can share any preset as a link. Tap the share icon on a preset and send the link via Messages, email, or any app. Recipients (free or Premium) tap the link and the preset is imported with one tap. It's perfect for trainers, study groups, and friends running the same routine.
No. Premium is a one-time $2.99 purchase. Pay once and use it forever on both iOS and macOS — it's a universal purchase. No subscription, no recurring fees.
Absolutely! IntervalTimer Duo comes with a built-in Pomodoro preset (25 minutes work / 5 minutes break). You can also customize the durations to create your own Pomodoro variation. The timers alternate automatically so you can focus on your work.
Are you a fitness trainer, YouTuber, or content creator who uses interval timers for HIIT, Pomodoro, workouts, or study sessions?
We'd love to collaborate! We offer free promo codes to creators who feature IntervalTimer Duo in their videos or social media posts.
Download free and try every Premium feature for 14 days. Whether you stay free or unlock Premium, there's no subscription — ever.
Free forever for the basics · $2.99 one-time unlocks Premium