IntervalTimer Duo

Multi-Phase HIIT & Tabata

Free · In-App Purchases

Build a workout with up to 10 timers, each with its own name and sound. Follow your position on the Lock Screen. Now a notification tells you when you hit your goal sets. IntervalTimer Duo is a simple and easy-to-use interval timer app for iPhone and iPad that runs up to 10 timers in sequence. 【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】 • Run your timers back to back, automatically • Build workouts with up to 10 timers — warm up, work, rest, cool down (Premium from the third timer) • 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 • 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 • Preset sharing via link (sending and receiving are both free) Premium (one-time purchase, or during the free trial): • A third timer and beyond (up to 10, each with its own name and sound) • Unlimited presets • 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

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v1.4.0 — A notification when your workout ends • You now get a notification when you reach your goal sets. If you miss the sound, it is still there on the Lock Screen and in Notification Centre. • While the app is open, the banner appears without a notification sound, so it never doubles up with the app's own finish sound. • Turn it on or off under "Notify when finished" in Settings. The notification arrives on runs that have a goal set count.

Version 1.4.0

The developer, kosuke konuma, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary based, for example, on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Size
    10.9 MB
    Category
    Health & Fitness
    Compatibility
    Requires iOS 26.1 or later.
    • iPhone
      Requires iOS 26.1 or later.
    • iPad
      Requires iPadOS 26.1 or later.
    • Mac
      Requires macOS 12.0 or later.
    • Apple Vision
      Requires visionOS 26.1 or later.
    Languages
    English and 4 more
    • English, French, German, Japanese, Spanish
    Age Rating
    4+
    In-App Purchases
    Yes
    Provider
    kosuke konuma
    • kosuke konuma has not identified itself as a trader for this app. If you are a consumer in the European Economic Area, consumer rights do not apply to agreements between you and the provider.
    Copyright
    © 2026 nwpo
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More

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