Intervals Pro: HIIT Timer
Intervals, LLC Health & Fitness iPhoneiPadiPod touchApple Watch
Intervals Pro: HIIT Timer is a free Health & Fitness app for iPhone and iPad by Intervals, LLC. Rated 4.8/5 from 13,711 ratings. Requires iOS 17.5.
- Rating
- 4.8
- 13.7K ratings
- Price
- Free
- on the App Store
- Size
- 65 MB
- Age 4+
- Updated
- Oct 26
- 2026 · v2026.10.1
Screenshots
About Intervals Pro: HIIT Timer
Custom Interval Training at its best for iPhone, Apple Watch and iPad. Featured by Apple and recommended by fitness instructors, personal trainers, marathon runners, and coaches. Let Intervals Pro guide you through any type of interval workout: HIIT, running, strength training, yoga, stretching, circuit training, boxing, MMA, elliptical, rehabilitation, meditation, 7-minute workouts, and many more. FEATURED BY • Apple - App of the Day in 132 Countries • Apple - Workout with Apple Watch, Quick HIIT Workouts • Women's Health Magazine • COACH Magazine • SixColors.com HIGHLIGHTS • Highly Customizable • Home Screen Widgets to quickly launch timers • Spoken interval names and prompts • Customizable alert sounds • Standalone Apple Watch workouts. Leave your iPhone at home! • Workout History using Apple Health data • View an Apple Watch workout live on your iPhone! • Run in the background with the screen locked • Play music or podcasts using the app of your choice • Bluetooth heart rate monitor support for Apple Watch or iPhone • Fill your Activity Rings • Siri Shortcuts • Share timers with friends • Time and Distance Goals • Running Pace and Heart Rate Targets • Auto pause and resume • Send completed workouts to Strava • Confetti! PERSONALIZE YOUR WORKOUT • Customize the Name, Duration, Alert, and Color for each interval • Customize Alert Sounds and Voice Prompts to guide you through your workout • Set a Countdown Alert and vibrations when the interval is about to end • Optional halfway alert • Set target heart rate ranges for each interval • Set time and distance goals FLEXIBLE INTERVAL DURATIONS • Time based (e.g., 45 seconds) • Distance-based (e.g., 0.5 MI or KM) • Count up intervals keep running until your ready for the next interval • Estimated time or distance. Count down time or distance to zero and then continue the interval, counting up until you're ready to move on. THE BEST APPLE WATCH INTERVAL TIMER • Leave your phone at home with our standalone Apple Watch app • Control your music or podcasts on the "Now Playing" screen • View an Apple Watch workout live on your iPhone • Alert Sounds and Voice Prompts to guide you through your workout • Configurable haptic alert countdown that taps you on the wrist when the interval is ending • Track heart rate, calories, distance, and pace • Route tracking for running, walking, and cycling • Workouts contribute to the Apple Watch Activity Rings WORKOUT HISTORY USING APPLE HEALTH • Intervals Pro has the best Apple Health integration of any interval training app • Track heart rate, calories, distance, and pace • Route tracking for running, walking, and cycling • Detailed stats for every interval • All your data is safely stored in Apple Health GREAT FOR RUNNING AND CYCLING • Interval duration can be set to either a specified time or distance • Display current pace, pace for the interval, or pace for the entire run • Configure heart rate ranges per interval • Analyze each interval of your run in the workout history MULTIPLE VOICES AND LANGUAGES • Select the language and voice to use for all spoken alerts. • Spoken alerts are localized to 10 languages. Chinese (simplified), Danish, Dutch, French, German, Italian, Norwegian, Polish, Spanish, and Swedish. Get Intervals Pro today, and your workouts will never be the same! SUBSCRIPTION INFO Intervals Pro is free to download and has a free timer. To create multiple timers and unlock all the features of the app, you may choose between a monthly or yearly auto-renewing subscription option. Upon confirmation of the purchase, payment will be charged to your credit card through your iTunes account. Subscription renews automatically unless canceled at least 24 hours before the end of the subscription period. Subscriptions can be managed and auto-renewal turned off in Account Settings in the App Store app. Privacy Policy and Terms of Service: https://intervalspro.com/privacy-policy.html
Ratings & reviews
4.8
13.7K ratings
What’s new
Version 2026.10.1 · Updated October 26, 2026
Fixed an issue that prevented some iOS 18 users from opening timer details from the timer list or starting timers. Other recent changes: Intervals Pro is ready for iPhone Duo!
App privacy
The developer, Intervals, LLC, reported these privacy practices to Apple.
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Usage Data: Product Interaction
Used for: Analytics
Alternatives to Intervals Pro: HIIT Timer
Looking for apps like Intervals Pro: HIIT Timer? Here are 6 similar apps on the App Store. The highest rated is Interval Timer □ HIIT Timer (4.8/5), and all 6 are free to download.
-
Seconds Interval Timer
4.7
-
RUN interval - Running Timer
4.7
-
Interval Timer □ HIIT Timer
4.8
-
Interval Timer
4.7
-
Interval Timer - Tabata Timer
4.5
-
Jeff Galloway Run Walk Run
3.7
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Intervals Pro: HIIT Timer | 4.8 / 5 (13,711 ratings) | Free | October 26, 2026 | |
| Seconds Interval Timer | 4.7 / 5 (23,778) | Free | Oct 22, 2026 | Compare |
| RUN interval - Running Timer | 4.7 / 5 (1,027) | Free | Jun 5, 2026 | Compare |
| Interval Timer □ HIIT Timer | 4.8 / 5 (87,280) | Free | Mar 26, 2026 | Compare |
| Interval Timer | 4.7 / 5 (3,602) | Free | Mar 6, 2026 | Compare |
| Interval Timer - Tabata Timer | 4.5 / 5 (19,144) | Free | Nov 4, 2025 | Compare |
| Jeff Galloway Run Walk Run | 3.7 / 5 (203) | Free | Oct 24, 2026 | Compare |