Box Timer: Interval Timer

Workout for Fighting & HIIT

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

FKN Timer is a training timer built around your own routine — from technical drills and conditioning to full rounds on the bag, pads or mat. Build a workout that matches how you train, start it in one tap, and keep your next move clear while you work. BUILD YOUR SESSION • Create and save workouts for boxing, Muay Thai, kickboxing, MMA, BJJ, wrestling and more • Combine warm-ups, drills, rounds, rest, cooldowns and repeat blocks • Browse exercises by discipline, set durations and repetitions, then arrange the session your way • Rename, duplicate and personalise workouts with your own icon and colour MAKE IT PERSONAL • Create custom exercises for your own drills and training methods • Add an icon, colour, description and optional photo or video link • Keep custom exercises alongside the built-in catalogue and reuse them in any workout STAY IN THE ROUND • See the current exercise, what comes next and the remaining workout time at a glance • Pause, resume, restart, skip forward or move back through a session • Use sound assistance and choose your preferred round bell • Keep an active workout visible on the Lock Screen, Live Activity and Dynamic Island • Control your session from Home Screen and Lock Screen widgets FINISH WITH THE NUMBERS • Review completed segments, total time and skipped time after each workout • Get an estimated calorie burn • Unlock and apply new timer styles as you train From shadowboxing and bag work to grappling drills and conditioning, FKN Timer gives your training a structure that is yours — then keeps you focused until the round is done.

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- Added separate `Timer` and `Workout` tabs with a customizable Quick Timer. - Redesigned workout editing with support for time, repetitions, count, weight, and notes. - Added drag-and-drop workout reordering, including grouped repeat blocks. - Added workout round-sequence previews showing active time, rest, and total duration. - Added workout actions: start, edit, rename, choose icon, duplicate, and delete. - Added personal details and more accurate active-calorie estimates based on performed exercises. - Improved the completed-workout screen with rounds, active time, rest time, total time, and calories. - Unified exercise colors across the timer, widgets, Live Activities, Dynamic Island, and AI screens. - Added Liquid Glass styling and improved dark-mode navigation and menu colors. - Improved workout catalog version compatibility, migrations, and handling of removed exercises. - Simplified Rewards, removed obsolete level data and the Shaking easter egg, and reorganized UI snapshot tests. Thank you.

The developer, Svyatoslav Boiko, 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

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

    Seller
    • Svyatoslav Boiko
    Size
    • 21.7 MB
    Category
    • Health & Fitness
    Compatibility
    Requires iOS 26.0 or later.
    • iPhone
      Requires iOS 26.0 or later.
    • Mac
      Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.
    Languages
    • English
    Age Rating
    9+
    Copyright
    • © hassle