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The smart workout log for strength training at the gym.

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Seconds Pro - Interval Timer

Seconds is an extremely popular, and highly versatile interval timer app for High Intensity Interval Training (HIIT), Tabata and circuit training workouts.

Download Seconds for free on iOS or Android and try all it's features. A one time in-app purchase for the Seconds Pro upgrade will allow you to save your timers rather than recreating them each time.

Download Seconds Interval Timer on the App Store Download Seconds Interval Timer on Google Play

Templates for HIIT, Tabata and circuit training

Seconds comes with templates for common interval programming allowing to build advanced timers in a matter of moments.

If the templates do not fit your needs you can use the custom timer to build your timer one interval at a time. You can even combine and loop through many timers using the compound timer.

Speaks your interval names

Often when working out you just want to keep your phone in your pocket and get on with it. But if you are doing a circuit involving many intervals how do you remember what's next?

Seconds will speak your interval names, so this is never a problem. There is even an option to let you know what the next interval is so you have time to prepare before it starts.

Soothing alerts

If you are looking for a mediation or yoga timer text-to-speech or high pitch beeps may not be appropriate. For situations like these Seconds comes with more soothing alerts such as bells and gongs, or you may wish to have no alert sounds at all, or just a vibration. All these options are available.

Music the way you like it

Seconds provides plenty of options for how you listen to your music while you workout. A few options include:

  • Assign songs to intervals
  • Play a playlist throughout a set
  • No music during your breaks
  • Shuffled album throughout the entire timer

Of course, if none of those suit you, you can simply listen to your favourite music player in the background and Seconds will play it's alerts over the top.

Import and export your timers

Importing and exporting timers from Seconds Pro could not be simpler. Just select the timers you wish to share and hit Export. Timers can be sent via email or AirDrop (on iOS devices).

Timers can even be shared with friends that don't have the app via the web sharing function. Once shared, an online timer will be created for anyone to use on any device.

Runs in foreground or background.

Seconds Interval Timer will continue to alert you of interval changes whether in the background or the foreground.

Color code your intervals

Colored intervals are great when you just need a visual clue to see which interval you are on and what is coming up next. Seconds displays the the whole screen in the current intervals color, apart from the next interval which uses it's own color.

Seconds has 10 colors to choose from with an advanced option to customize the colors if you wish.

Vertical and horizontal timer display

Seconds utilises all the available width for the main timer display so it's easy to read at a glance. By default it displays the interval time remaining, but can be configured to show total time remaining, or elapsed times.

Recent Customer Reviews

Just what I needed!

I was running for an hour or hour and a half every morning and out of a need to sped things up a bit, I started researching HIIT. This app streamlined my morning routine. I love the spoken options and the easy ability to customize. I’m hooked!

Solid and reliable.

Set the app, press go and get your work done. This app gets right out of your way and lets you focus on the the workout.

This developer knows his fitness apps.

Well done Runloop.

Solid app.

The best workout helper

This app is easy to use and completely transformed my workouts. I use it six days per week and couldn’t be happier.


It’s a great app u can make your own workouts

Easy. Many options.

Perfect for more than exercise! I use it for my young daughter while learning to taking a shower by herself. This app paces her and helps her to move on without her being mad at me.

I have used it in my classroom as well to pace students on a test.

Best Workout App By Far

I’ve been lifting solidly for around 5 years now, and during that time I couldn’t find an app with the functionality and flexibility I needed, so I used Notes which did the job well enough but was a bit cumbersome and messy. Recently I discovered this app and have to say I’m amazed by it. Has all the functionality I need while allowing for a lot of customisation. Takes a bit of time to get the hang of it, but it’s extremely useful and would thoroughly recommend buying. Can confidently say it’s improved my workouts.

App That Has It!

This app will help you reach the fitness goals you set for yourself! The developers are quite responsive to feedback. Also, this wheel ain't broken (perfect thus far) and this is a great paid App; do not add in app purchase!


Three year user. It is the cornerstone for our daily exercise routines. Software is very user friendly, flexible to meet our personal needs & very stable. Highly recommend.

Been using for over a year. Love it

I’ve programmed a dozen or so HIIT workouts. Easy to use but very flexible. Voice prompts and alerts very helpful. Can’t imagine working out without it now.

One of the most useful apps in my life

It just does all that you need it to do. I get the feeling the developer uses it heavily.

Does the thinking for me!

I’ve been using this app for over a year now and I just love it! It stores all my data for me. I’m constantly traveling and it easily switches between kg/lbs as international gyms usually have a mix of the two. It gives me a countdown when my rest time is coming to an end. It shows my progress be week/month. I’ve compared with several different apps but HeavySet always has more features and it’s user-friendly. Big fan! Thanks!

Great app

I love programming my workouts.