Simple Interval Timer (SIT) can be used for any kind of interval training, such as running, cycling, HIIT sessions (including Tabata method), stretching, etc.

SIT is exactly what you would expect. An interval timer, which is easy to set up and use. It features a nice plain design, with no unnecessary controls.

Adjust Number of Sets, Action and Break duration to your needs and you are ready to go!

On the iOS an extra switch control allows you to prevent the screen from dimming.

SIT remembers the last 5 configurations you have used. Swipe left across the Settings screen to switch to another configuration.

SIT can run in the background, while you are playing music, watching videos or doing anything else on your iOS device.

SIT Watch features the same simplicity as the iOS app while offering the same functionality, plus it will measure your heartbeat during the workout sessions. The recordings will be available in the Apple's Health app.

SIT Watch runs independently of the phone, so no need to have your phone around during your workouts (although you will need your phone during the very first time you launch SIT watch).

SIT lets you avoid any tedious set up and focus on your training!

What’s New

Version 5.0.1

Fixed saving timer configurations.

Widgets! Now you can add your favorite timer configurations to the home screen and start the timer with just one tap.

Ratings and Reviews

3.9 out of 5
97 Ratings

97 Ratings

Mr Corbog ,

Good interval timer for iPhone

This interval timer works well with the iPhone both with or without headphones. Simple and easy to use. When I use it with Apple Watch it only has a vibration functionality in between sets. The IPhone has an audible beeping functionality that you can hear even if you have music playing in between sets. This is key as the vibration is not strong enough on the Watch when I’m running so I miss the intervals here and there which defeats the purpose.

jpicken ,

Good, Simple Interval Timer

This is just the sort of timer I was looking for. I like the repeat function, the changeable number of sets, and the break between each repeat. It would be nice if I could set the times in individual seconds instead of five seconds blocks, especially for the breaks. It’s nice to be able to have it on my watch so I don’t have to take my phone with me all the time.

M1CH43L ,

Barely Passable

App has not been updated in ages, so the interface doesn’t work well with the latest OS. The sounds it makes are obnoxious and sadly not customizable. If I play music to an airplay device while using the timer, I lose the ability to adjust the timer volume. The Watch app also manages to disrupt the recording of exercises, so I have to use my phone for the timer and record my exercise with my watch, which shouldn’t be necessary. I have also observed that the timer function doesn’t even always keep accurate time: sometimes the interval is cut short.

App Privacy

The developer, 0FF, 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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