IntervalTimer Duo

Two alternating timers with automatic set tracking. Built for HIIT and Pomodoro. Lock Screen progress, preset sharing by link. v1.2.5: more reliable in the background.

IntervalTimer Duo is a simple and easy-to-use interval timer app for iPhone and iPad that alternates between two customizable timers.

【Key Uses】 • HIIT (High-Intensity Interval Training) • Pomodoro Technique (work and break cycles) • Cooking timing management • Stretching and yoga routines • Study and rest cycle management

【Features】 • Automatically alternate between two timers • Each timer adjustable from 1 second to 60 minutes • Preset feature to save and instantly recall favorite settings (1 preset free; unlimited presets: Premium) • Share presets via link — let friends import your timer setup in one tap (Premium) • Set counter to track progress toward your target sets (Premium) • Audio notifications and vibration when timers end • Live Activity shows remaining time on Lock Screen and Dynamic Island (Premium) • Customizable alert sounds (extra sounds: Premium) • Simple and intuitive interface

【Preset Sharing】 • Share your favorite timer configurations via link • Recipients can import presets with a single tap • Sync routines with your team or workout partners

【Ease of Use】 • One-tap start, pause, and reset • Quick time setting with preset buttons • Visual circular progress bars show remaining time • Second timer can be enabled/disabled as needed • Set counter tracks completed sets toward your goal

【Free & Premium】 The app is free to download and use. After installing, all premium features are unlocked for a 14-day free trial. When the trial ends, premium features require a one-time purchase (pay once, use forever) — a Universal Purchase shared between iOS and macOS.

Free forever: • Two timers running alternately (1 second to 60 minutes each) • One saved preset • Basic alert sounds • Audio and vibration notifications when timers end • Circular progress bar

Premium (one-time purchase, or during the free trial): • Unlimited presets • Preset sharing via link • Set counter • Additional premium alert sounds • Live Activity on Lock Screen and Dynamic Island

【Compatibility】 • iPhone and iPad • Available in English, Japanese, French, German, and Spanish

【Universal Purchase】 If you own the macOS version, you can use the iOS version at no additional cost.

A simple yet fully-featured interval timer app that's perfect for any timing needs.

Privacy Policy: https://techback.info/interval-timer/ios/privacy-policy.html Terms of Use (EULA): https://techback.info/interval-timer/ios/terms-of-use.html