A simple HIIT app specifically engineered for Apple Watch. It also provides a simple HIIT timer for iPhone/iPad.

With easy setup, clean display, live heart rate, haptic feedback, workout summary and completely independent Apple Watch app experience, your interval workouts will undoubtedly be fun.

The workout also adds up to the move and exercise rings on Apple Watch.


• Super easy setup
Digital crown makes setting intervals a breeze. The app remembers your previous settings.

• Clean display
Large fonts, vivid colors, live heart rate

• Workout summary
Calories burned, average and max heart rate, total time

• Health app integration
Workouts are saved to the Health app

• Audio alerts and haptic feedback
Subtle haptic feedback guiding you through the intervals. You can also set audio beep alerts if you want.

• Runs in background
A completely independent Apple Watch app experience

• Complications
They show the time left for the workout. Also, they are a quick way to launch the app.

• More settings
+ Warm up interval
+ Cooldown interval
+ Last rest interval
+ Halfway alert
+ 8 sec warning during rest
+ Interval change warning (when 5 seconds are remaining)

• Extra
A simple HIIT timer for iPhone/iPad

* Note: Though this app is primarily designed for Apple Watch, it also provides a simple iPhone/iPad HIIT timer.

What’s New

Version 2.4.2

• Support added for complications on Infograph and Infograph Modular watch faces
• Other enhancements and bug fixes

Ratings and Reviews

4.2 out of 5
9 Ratings

9 Ratings

Ggirton ,

I use this watch HIIT app several times a week

I got this some months ago when I was about halfway through a 10 week program in the book “you are your own gym“. Now I’m in week 10 of a second 10 week program, and this little watch app has been so useful! The only downside: you can have only 20 reps, and the book, on the Tabatas days, calls for three groups of eight: oops, that’s 24! Hey, that’s OK, Tabatas are hard anyway :-) 20 is fine.

I really like how the results of the workout feed into the activities app. In order for this to happen, you have to agree for access to Apple health. Make sure you decide to do this the first time, otherwise you will have to delete the app and reinstall it again to activate this.

There are several different configurations of HIIT that I do, and it is very easy to adjust those using the watch interface. It comes with a Phone app as part of it, but I have never used it. I always use the watch.

I would definitely recommend this app if you are doing high intensity interval training.

Brian T. Edmondson ,

Awesome and Easy

Really like this app. Really easy to use and setup. The fact that it's native for the Apple Watch really makes the display and prompts easy and visually appealing.

Integrates with Apple Health perfectly.

Love it!

MjG3633 ,

Don’t buy

Does not download to Apple Watch 4. Payed for the app and didn’t get what I payed for. Don’t waste your money. Terrible.

Developer Response ,

We have added support for Apple Watch Series 4 complications in v2.3. Kindly update the app. If you face any issues, do let us know.

App Privacy

The developer, RhythmicWorks, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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