# HIIT Timer vs MuscleTrainingTimer

The clearest difference is in-app purchases: HIIT Timer at none against MuscleTrainingTimer's 1. MuscleTrainingTimer's advantage is ads (none vs shown) and update cadence (every 9 days vs every 5 months). On price, device support and iOS requirement there is nothing between them.

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

HIIT Timer ships an update every 5 months, MuscleTrainingTimer every 9 days. The most recent releases landed on September 19, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | HIIT Timer | MuscleTrainingTimer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 9 days** |
| Size | 9 MB | 20 MB |
| Requires iOS | **15.2** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [masaaki genno](https://appshunter.io/developer/1611455396) | [ryo muranaka](https://appshunter.io/developer/1606480078) |

## What reviewers say

### HIIT Timer

[App page](https://appshunter.io/ios/app/hiit-timer-hiit/id1611455394)

**Features:** macOS Compatibility

**In-app purchases:** none


### MuscleTrainingTimer

[App page](https://appshunter.io/ios/app/muscletrainingtimer-exercise/id6446249318)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro | $19.99 | one-time |


## Frequently asked questions

### Is HIIT Timer free?

HIIT Timer is free to download, with no in-app purchases.

### Is MuscleTrainingTimer free?

MuscleTrainingTimer is free to download, with in-app purchases available.

### Do HIIT Timer or MuscleTrainingTimer have ads?

HIIT Timer shows ads; MuscleTrainingTimer does not.

### Which is updated more often, HIIT Timer or MuscleTrainingTimer?

HIIT Timer ships an update every 5 months, and MuscleTrainingTimer every 9 days. Most recently, HIIT Timer was updated on September 19, 2026 and MuscleTrainingTimer on September 14, 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.*