# Interval Timer vs Radical Trainers

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.

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

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.

## The numbers

| Metric | Interval Timer | Radical Trainers |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (246 ratings)](https://appshunter.io/ios/app/interval-timer-hiit-workout/id1596127692/reviews)** | — |
| Number of ratings | **246** | — |
| Positive reviews | 83.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 12 MB | 61 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yosyp Hameliak](https://appshunter.io/developer/895008826) | [Radical Fitness](https://appshunter.io/developer/1157771840) |

## What reviewers say

### Interval Timer

[App page](https://appshunter.io/ios/app/interval-timer-hiit-workout/id1596127692)

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:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


### Radical Trainers

[App page](https://appshunter.io/ios/app/radical-trainers/id1639124257)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*