Minterval: Fitness Timer

HIIT, 4x4 & Heart Recovery

Free · In‑App Purchases

The 4×4, measured properly — so you can tell whether it worked. Choose your work interval, recovery time and number of rounds—for example, four minutes hard, three minutes easy, repeated four times. Minterval runs the session, then measures what it did to you: how long you held your target band and how quickly your heart rate came down afterwards. It does not invent numbers. No estimated VO₂ max, no population percentile, no made-up score. Every figure on the screen was measured on you, or it is not there. WHAT IT MEASURES • Time held in your target band, round by round • Heart recovery — HRR60 and HRR120, using the same recovery protocol each time • Your history: this week free; month, year and all-time with Pro • 4×4 Test Lab — a fixed benchmark with a saved profile, quality checks and every attempt retained BUILT TO BE USED IN A GYM • A recorded coach who counts you in and calls the last minute • Your own music from Apple Music — a song, playlist or whatever is already playing • A PowerSong that lifts in the closing minute of every work round • Apple Watch and Apple TV companions • Written sessions including pyramids, ladders and ramps HONEST ABOUT WHAT IS FREE The timer is free: unlimited rounds, warm-up and cool-down, live heart rate, five zones, heart recovery and this week’s Gym Data. Minterval Pro is one purchase — no subscription — and adds saved sessions, the 4×4 Test Lab, history beyond a week, the Apple Watch companion, custom maximum heart rate and zones, and the FLUID 1 music pack. PRIVATE BY DEFAULT No account. No sign-in. Nothing is sent to us. Workout history remains on your devices and in Apple Health; Minterval has no analytics or server. Heart measurements require an Apple Watch or compatible Bluetooth heart-rate monitor. The interval timer works without either.

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• Your heart-rate zone appears from your first session. Minterval starts from your age estimate and moves to your own measured peak as soon as a workout has recorded one. • Onboarding, Settings and your workout history now name exactly what Minterval reads from and writes to Apple Health — and the timer works without it.

Version 1.0.1

The developer, Grant NEALE, 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, for example, based 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

    Seller
    Grant NEALE
    Size
    72.4 MB
    Category
    Health & Fitness
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • Apple TV
      Requires tvOS 17.0 or later.
    • Apple Watch
      Requires watchOS 10.0 or later.
    Languages
    English and 5 more
    • English, French, German, Italian, Portuguese, Spanish
    Age Rating
    9+
    In-App Purchases
    Yes
    • Iron $2.99
    • Kettlebell $2.99
    • Fluid 2 $2.99
    • Recovery $2.99
    • Fluid 1 $8.99
    • Minterval Pro $8.99
    • Learn More
    Copyright
    © 2026 Grant Neale
  • Developer Website
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