Loop Timer - HIIT
Interval timer for HIIT
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
Apple Watch with live heart rate, Dynamic Island, Apple Health. Loop your work and rest intervals.
A simple interval timer that loops work and rest. Works with Apple Watch and the Dynamic Island.
Set your times, tap start, and it loops automatically — for Tabata, HIIT, circuit training, stretching, or timing sets at the gym.
■ Always visible in the Dynamic Island and on the Lock Screen
See the remaining time and current phase even while using other apps. The timer keeps running with the screen locked and alerts you with sound and vibration.
■ Apple Watch, right on your wrist
Start, pause and skip from your Apple Watch while your iPhone stays in your bag. Phases are signalled by haptics. Both devices stay in sync and show the same remaining time. Live heart rate appears on the Watch, the iPhone and the Dynamic Island.
■ Apple Health
Sessions are saved as HIIT workouts. With Apple Watch, heart rate and calories are recorded too. Review your history in the app: duration, energy, average and maximum heart rate.
■ Three counter styles
• Digits — just a big number
• Ring — the remaining time shrinks clockwise
• Bars — a bar chart you can read at a glance
Switch styles while running. Landscape is supported.
■ Sounds you can choose
Three volume levels and three sounds (beep, chime, wood). Preview each one with a tap.
■ Fine control
Adjust times in steps of 1, 5, 10 or 30 seconds — 23 seconds is no problem.
■ Two looks, nine languages
Choose the gray or pastel theme. Available in English, Japanese, Simplified and Traditional Chinese, Korean, Spanish, German, French and Portuguese.
■ Ready-made presets
• Tabata 20s/10s × 8 rounds
• HIIT 30s/30s × 10 rounds
• 4020 40s/20s × 8 rounds × 2 sets
• EMOM 50s/10s × 10 rounds
■ Free and unlocked
The free version runs all four presets, lets you switch counter styles and shows the Dynamic Island.
A one-time purchase (no subscription) unlocks:
• Changing every duration
• Saving your own named presets
• Volume and sound choice
• Apple Watch app with heart rate
• Apple Health recording and workout history
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
■ Apple Watch and heart rate
Start, pause and skip from your wrist. Live heart rate on the Watch, the iPhone and the Dynamic Island.
■ Apple Health
Save sessions as HIIT workouts and review your history: duration, energy, average and maximum heart rate.
■ Two looks
Choose between the gray and pastel themes.
■ Nine languages
Japanese, English, Simplified and Traditional Chinese, Korean, Spanish, German, French and Portuguese.
■ Also
Dynamic Island support, three sounds and volume levels, 1-second steps, landscape mode, and a cleaner main screen with settings on a separate page.
The developer, YOSHIYUKI UEMATSU, 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- YOSHIYUKI UEMATSU
- Size
- 3.3 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
English and 8 more
- English, French, German, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Unlock custom timing $2.99
- Copyright
- © 2026 YOSHIYUKI UEMATSU