# Rebel Gym vs Interval Timer (Simple)

The clearest difference is in-app purchases: Rebel Gym at none against Interval Timer (Simple)'s 1. Rebel Gym also leads on iOS requirement (12.1 vs 15.1). Interval Timer (Simple)'s advantage is update cadence (weekly vs every 10 months). On price, ads and device support there is nothing between them.

Both are free to download. Interval Timer (Simple) sells 1 one-off in-app purchase. Rebel Gym asks for nothing beyond the download.

Rebel Gym ships an update every 10 months, Interval Timer (Simple) weekly. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Rebel Gym | Interval Timer (Simple) |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Weekly** |
| Size | 28 MB | 28 MB |
| Requires iOS | **12.1** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Rebel Gym](https://appshunter.io/developer/1547915076) | [Domett Xing](https://appshunter.io/developer/1876098022) |

## What reviewers say

### Rebel Gym

[App page](https://appshunter.io/ios/app/rebel-gym/id1547914714)

**Features:** macOS Compatibility

**In-app purchases:** none


### Interval Timer (Simple)

[App page](https://appshunter.io/ios/app/interval-timer-simple/id6758968811)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Purchase | $6.99 | one-time |


## Frequently asked questions

### Is Rebel Gym free?

Rebel Gym is free to download, with no in-app purchases.

### Is Interval Timer (Simple) free?

Interval Timer (Simple) is free to download, with in-app purchases available.

### Do Rebel Gym or Interval Timer (Simple) have ads?

Neither Rebel Gym nor Interval Timer (Simple) shows ads.

### Which is updated more often, Rebel Gym or Interval Timer (Simple)?

Rebel Gym ships an update every 10 months, and Interval Timer (Simple) weekly. Most recently, Rebel Gym was updated on October 12, 2026 and Interval Timer (Simple) on October 7, 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.*