Comparison

Interval Timer vs Radical Trainers

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Interval Timer

This interval timer is designed for HIIT and interval training. Easily set work and rest periods, sets, and rounds to guide your workouts. It supports background operation and music playback, with an Apple Watch companion app for heart rate monitoring.

Highlights
  • Customizable work and rest periods
  • Set number of sets and rounds
  • Background operation support
  • Music playback compatibility
  • Apple Watch integration
  • Heart rate monitoring (Apple Watch)
Features
Read full description

This app is handy interval timer that helps you keep track of your work and rest periods during your HIIT interval training and workouts. The application is very easy to use, enter the Work, Rest, Sets, Rounds and start workout. You can listen to music during workouts or use the timer in the background. There is also app on the Apple Watch that will allow you to monitor your heart rate during workouts. Apple Watch app features: - iCloud sync with iPhone - integration with the Health app - monitoring heart rate during workouts

About

Radical Trainers

Features
Read full description

We’ve rebuilt the Radical Fitness App from top to bottom. The third generation Radical Fitness App is here now. Easier and friendlier to navigate - plus create your own playlists as simple as 123. Bigger, better, faster - download the new App today and get the same features and benefits, which have been significantly upgraded for the users' simplicity of use. Key features of the new App: • Design is now simpler to operate. • Program layout is now customized vertically, so much easier to click on the program and the release you want to access. Simply scroll for mix selection. • Users can now view six mixes on the screen compared to only two to three before. • Searching for tracks is smoother as you can easily move back to where you were previously without starting back at the beginning again. • A new indicator gives you a visual record of the tracks being downloaded. • Individual tracks can now be downloaded rather than the whole mix, meaning that you can also now delete a single track from a mix you’ve downloaded. This frees up space with tracks you won’t use. • Creating playlists is easier and more functional, and the deleting of tracks is a simple smooth double click. • In MY LIBRARY, you can view only the mixes that have been downloaded, which makes searching a breeze. • Searching for your favorite track just got easier as you can now search for a song by its name. • FAVORITES, you can select favorite tracks, making it easier to search for tracks you like. • In NOW PLAYING, you can view what track is coming up next. • In NOW PLAYING, you can also see the Beats per Min of each track, which allows you to see the peaks in a class. • If you get a new device, you will keep your playlists and favorites; you will only have to download them again or use them with an internet connection!

Screenshots

Interval Timer4 screens
Radical Trainers4 screens

Verdict

The call

The clearest difference is in-app purchases: Radical Trainers at none against Interval Timer's 1. Radical Trainers also leads on ads (none vs shown). Interval Timer's advantage is device support (4 vs 2) and iOS requirement (13.0 vs 17.0). On price and update cadence there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Interval Timer sells 1 one-off in-app purchase. Radical Trainers asks for nothing beyond the download.

UpkeepUpdate frequency

Interval Timer ships an update every 2 months, Radical Trainers every 3 months. The most recent releases landed on October 19, 2026 and October 13, 2026 respectively.

Scorecard4 real differences · 6 level
Interval Timer versus Radical Trainers: the parameters behind the verdict, then further details
ParameterInterval TimerRadical Trainers
PriceFreeFree
Rating4.9 (246 ratings) — better—
Positive reviews83.5% of reviews—
Number of ratings246 — better—
Update frequencyEvery 2 months — betterEvery 3 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size12 MB61 MB
Age rating4+4+
DeveloperYosyp HameliakRadical Fitness

In-app purchases

1 purchases

Interval Timer

One-time1
  • Remove Ads$4.99
None

Radical Trainers

No in-app purchases

Questions

Is Interval Timer free?
Interval Timer is free to download, with in-app purchases available.
Is Radical Trainers free?
Radical Trainers is free to download, with no in-app purchases.
Do Interval Timer or Radical Trainers have ads?
Interval Timer shows ads; Radical Trainers does not.
Which is updated more often, Interval Timer or Radical Trainers?
Interval Timer ships an update every 2 months, and Radical Trainers every 3 months. Most recently, Interval Timer was updated on October 19, 2026 and Radical Trainers on October 13, 2026.

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