Norwegian 4x4 Protocol: Boreas app icon

Apps Like Norwegian 4x4 Protocol: Boreas for iPhone and iPad

Train with 4x4 intervals and track heart

Perform 4x4 interval training with customizable warm-up and cooldown durations. Track heart rate and calories using Apple Watch. Receive voice guidance for interval transitions.

by Havard Tryman★ 4.725 ratingsSportsFreeData updated 2026-09-06

Ranked alternatives

Showing 21–40 of 1,000 ranked alternatives.

  1. FITIV Pulse - Workout Tracker app icon

    FITIV Pulse - Workout Tracker

    MotiFIT Fitness Inc.

    Track heart rate and workouts in real

    Track heart rate live from AirPods Pro 3 and Powerbeats Pro 2 without a chest strap. Monitor training readiness, daily strain, and recovery status. Sync data from Apple Watch, Garmin, Oura, and WHOOP. Log workouts and view progress charts.

    ★ 4.612,651 ratingsHealth & FitnessFreeData updated 2026-09-09
  2. iRunner Run & Jog Tracker app icon

    iRunner Run & Jog Tracker

    Fitdigits Inc

    Track runs, map routes, and monitor heart

    Track runs and walks with route creation and progress comparison. Monitor heart rate and sync with Apple Health and Apple Watch. Set goals and receive voice coaching. Enable LiveTracking and group tracking. Share runs with friends and family.

    ★ 4.94,431 ratingsHealth & FitnessFreeData updated 2026-09-08
  1. Tabata Timer · app icon

    Tabata Timer ·

    HIIT Apps Sp. z o.o.

    Set prepare, work, rest intervals

    Set workout intervals with customizable prepare, work, rest, and cool down times. Adjust cycles and sets. Configure individual intervals for custom sequences. Use voice assistant for text-to-speech guidance.

    ★ 4.71,430 ratingsHealth & FitnessFreeData updated 2026-09-06
  2. Seconds Interval Timer app icon

    Seconds Interval Timer

    Runloop Ltd

    Track intervals and manage workouts

    Track intervals with customizable timers for HIIT, Tabata, and Circuit Training. Set full-screen displays in landscape or portrait. Combine multiple timers for complex workouts. Receive spoken names and warnings.

    ★ 4.723,606 ratingsHealth & FitnessFreeData updated 2026-09-08
  3. Move With Us app icon

    Move With Us

    Global Fitness Pty Ltd

    Workout at home or gym

    Track workouts video tutorials and progress metrics. Log meals custom meal guides and nutritional info. Set fitness goals and receive personalized training plans. Sync fitness trackers and view activity summaries.

    ★ 4.97,151 ratingsHealth & FitnessFreeData updated 2026-09-06
  4. Gymaholic: Workout Tracker app icon

    Gymaholic: Workout Tracker

    Devenyi Gabor

    Track workouts, build routines, crush goals

    Track workouts by logging sets, reps, and weights. Build custom routines tailored to fitness goals. Sync with Apple Watch for real-time data. View progress charts and adjust training plans as needed.

    ★ 4.63,460 ratingsHealth & FitnessFreeData updated 2026-09-08
  5. GymNext Flex Timer app icon

    GymNext Flex Timer

    1804282 Ontario Limited.

    Train intervals with and display control

    The controls a wall-mounted LED display and offers interval training features. Users can set custom workout intervals, track time, and manage sessions. It supports multiple workout types like CrossFit and HIIT.

    ★ 4.82,104 ratingsHealth & FitnessFreeData updated 2026-09-09
  6. Interval Timer: HIIT Workout app icon

    Interval Timer: HIIT Workout

    Yosyp Hameliak

    Track work and rest intervals

    Track work and rest intervals for workouts. Set custom durations for sets and rounds. Start and pause sessions manually or with voice commands. Monitor heart rate via Apple Watch. Sync progress with iCloud and integrate with Health .

    ★ 4.9230 ratingsHealth & FitnessFreeData updated 2026-09-06
  7. Interval Timer - Tabata Timer app icon

    Interval Timer - Tabata Timer

    NEO PIXEL LABS PTE. LTD

    Track workout intervals and rest periods

    Track work and rest intervals during workouts. Set total time and alternate between high and low intensity periods. Run in foreground, background, or with device locked. Log exercise types like cycling, running, lifting, or stretching.

    ★ 4.519,084 ratingsHealth & FitnessFreeData updated 2026-09-08
  8. Interval Timer app icon

    Interval Timer

    HIIT Apps Sp. z o.o.

    Set intervals for tabata workouts

    Set intervals for prepare, work, rest, and cool down periods. Adjust duration and number of cycles. Configure custom sequences for training. Use voice commands for guidance. Track workout progress with real-time timing.

    ★ 4.73,110 ratingsHealth & FitnessFreeData updated 2026-09-06
  9. Pulse & Heart Rate Monitor app icon

    Pulse & Heart Rate Monitor

    Yip Tak Keung

    Track , HRV, and blood oxygen levels

    Track and variability with advanced algorithms. daily steps and blood oxygen levels. Set goals and view progress over time. Sync data with apps and receive notifications for abnormal readings.

    ★ 4.76,397 ratingsHealth & FitnessFreeData updated 2026-09-15
  10. Timer Tabata for Workout, HIIT app icon

    Timer Tabata for Workout, HIIT

    Alexander Senin

    Track intervals, rounds, and time

    A workout with interval training modes including , Rounds, Stopwatch, Intervals, and Workout of the Day. Displays round count and duration. Works in background with premium version. Tracks time and allows customization of sessions.

    ★ 4.7517 ratingsHealth & FitnessFreeData updated 2026-09-08
  11. Interval running: Run tracker app icon

    Interval running: Run tracker

    Maxim Kazakov

    Customize intervals, track runs, control workouts

    Create runs with customizable time, distance, or open intervals. Design HIIT, tempo, fartlek, pyramid, or progression workouts. Track pace, cadence, and heart rate in real time. Save and reuse favorite routines. Syncs with Apple Watch.

    ★ 4.529 ratingsHealth & FitnessFreeData updated 2026-09-06
  12. Simple Interval Timer app icon

    Simple Interval Timer

    Alena Kazarova

    Train intervals with custom timing

    Set training sessions with customizable sets, actions, and breaks. Track time for exercises and rests. Save session settings for future use. Prevent screen dimming on iOS during workouts.

    ★ 4.95,474 ratingsSportsFreeData updated 2026-09-08
  13. SmartWOD Workout Generator app icon

    SmartWOD Workout Generator

    SmartWOD GmbH

    Track time and browse workouts on

    Generate random functional fitness workouts based on available equipment. Select equipment, click "GO," and browse generated WODs. Track time directly within the . No barbell? Use bodyweight or household items.

    ★ 4.94,840 ratingsHealth & FitnessFreeData updated 2026-09-14

How we rank alternatives

Apps are ranked by functional similarity, category fit, rating confidence, and popularity.