HeavySet Logo
The smart workout log for strength training at the gym.

Download on the App Store

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

Great Ap!

Appreciate the freedom to make your own timed workouts or to use the suggested timings. Also like the variety of tones available to mark the timings intervals.


I’ve used RepCount for years as well as strong and others on the App Store, this is the first app I’ve seen that would easily allow DUP and other more complex programmes to be built in without the need for excel spreadsheets very very impressive and a clean interface

Love it. Keeps me disciplined

I create custom routines for stretching and planking. It forces me to hold the duration of each stretch or plank. Being able to have music play in the background is bonus motivation.

Great App

I recommend this to many of my patients!! I live that there are some really quick workouts that don’t need any equipment. I try to do it a few times per week.

Far above the rest

Flexible and powerful. Does everything I need and more.


Works amazingly with my Apple Watch!

Great App!!!

I’ve been using Seconds Pro for years. It’s customizable for more than just workouts. It helps me keep on track of my workflow almost on a daily basis.


Simple to use and has become my go to quick workout partner. Especially useful for those quick ‘need to just do a session’ moments where the sample workouts can just be chained together.

Best timer ever!

Love this timer. I can customize it for so many things.

Great app..!

Love it..! Use it for all my workouts plus use it in my PT and 1 on 1 sports training sessions

Best workout tracking app

Better than anything I have used. And it has a free trial period with access to all functionality. 11/10

Most flexible exercise timer app by far.

I've tried a whole lot of timer apps for directing me through my exercise routines so that I don't have to look at a list or remember the order. This timer is the only one I've found that not only can speak the interval names, but also lets you define rest times, number of repetitions of an interval, and marking an interval as split left/right for when you do the same pose or exercise on each side! I like how the interface is so simple, yet you can use it to build almost any kind of routine. It could be useful for other kinds of guided routines as well; it's designed for exercise, but I could also use it as a task/break timer, for example. Very handy app and well designed.