The best interval timer app for IOS just got even better! Downloaded by over 100,000 awesome people just like you, Intensity is the workout companion you’ve been looking for. 

*** Now with Siri Shortcuts all new for iOS 12 ***

Before we tell you more, have a look at what people are saying:

“This makes HIIT effortless. You don't have to think about what songs to play or how many intervals you have done, it does it all for you.

“I downloaded this app to help with home tabata workouts and it is just what I was looking for. I love having my own playlist to keep me going through a tough workout!”

“What more could you want then your own personal music & timers to keep you moving!”

You love HIIT because it’s a quick workout style that you can easily fit into your daily routine. We agree, and would hate to see you squandering your valuable time screwing around with a lame, hard to use timer app. That’s why we built a workout timer so easy to use, even your technology-challenged family member of choice would adore it.

Download and get started in seconds with built-in curated workouts. Go deeper with the flexibility of the best workout builder on the app store, adding your own custom intervals, rests, warm-up/cool-down,  caloric burn, and music selection. Speaking of music, have it your way with tunes from your own music library or use music from other apps, Intensity runs in the background so you can continue your routine even while using other apps or putting your device to sleep. Subtle sound queues and text-to-speech interval  announcements will guide you through each workout. And of course, we know how important it is for you to make progress towards your fitness goals, so we’ve added a workout log as well as easy integration with the iOS health app.

Intensity - Your workouts, your way. 

What’s New

Version 10.1.0

All new update for iOS 12 with support for Siri Shortcuts to start, pause, and resume workouts.

As always, if you enjoy the app, please consider rating us on iTunes.

Ratings and Reviews

4.5 out of 5
716 Ratings

716 Ratings

Jsbicisnbdjciofmdn ,

Makes workouts easy + quick

I LOVE working out and forming my own training sessions, but most of the times it’s a huge hassle to set up a timer and stay motivated. This HIIT timer is easy to set up and customize, and allows you to listen to music while working out. The app tells you what move is next, how much longer you have, and counts down the last five seconds of each move- life saver!!! It also tracks what days you workout/don’t (rest days rockkk) and gives you several workouts for FREE when you download. No reason not to!! Plus workouts are super fast but leaves you with a burn for several days! Highly recommend!!

THe pinsta ,

Good but could be more functional on watch

I enjoy the amount of detail that I am able to incorporate in workouts though this app. Great directions and ease of use on app. However, it could be more user friendly on the watch by:

-Being able to save workouts
-being able to choose workouts
-having a watch face icon, accessible from a main screen

MomHouston ,

Good workout for P.E. class

I am a P.E. teacher and I use this for the fitness portion of class 2-3 days a week. The kids have a love/hate relationship with it. They can see the increase in strength and cardiovascular endurance. They are getting ready for fitness testing. Thank you for a good product. Now we need shorter HIIT workouts for out minimum days!


Atlantia Software LLC
38.1 MB
Health & Fitness

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, French, German

Age Rating
Rated 4+
© 2017 Atlantia Software LLC
In-App Purchases
  1. Premium Upgrade $1.99
  2. Intensity Pro Upgrade $4.99
  3. Mega Pack $3.99


  • Family Sharing

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

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