# Interval Workout Fitness Timer vs MuscleTrainingTimer

The clearest difference is in-app purchases: Interval Workout Fitness Timer at none against MuscleTrainingTimer's 1. Interval Workout Fitness Timer also leads on iOS requirement (11.0 vs 16.0). MuscleTrainingTimer's advantage is update cadence (every 9 days vs monthly). On price, ads and device support there is nothing between them.

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

Interval Workout Fitness Timer ships an update monthly, MuscleTrainingTimer every 9 days. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Interval Workout Fitness Timer | MuscleTrainingTimer |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 64.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 9 days** |
| Monetization | Free | — |
| Size | 24 MB | 20 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yudai Fukuda](https://appshunter.io/developer/1434814836) | [ryo muranaka](https://appshunter.io/developer/1606480078) |

## What reviewers say

### Interval Workout Fitness Timer

[App page](https://appshunter.io/ios/app/interval-workout-fitness-timer/id1173257343)

This app provides an optimized interval timer for various training routines, including strength and trunk training. It offers essential features like voice countdowns, vibration alerts, and background operation to support your workouts. Customize your training sessions with simple or personalized timers.

**Highlights:** Simple and customizable timers, Voice countdowns, Vibration notifications, Background operation, Remaining time animation

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

**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 Interval Workout Fitness Timer free?

Interval Workout Fitness Timer is free to download, with no in-app purchases.

### Is MuscleTrainingTimer free?

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

### Do Interval Workout Fitness Timer or MuscleTrainingTimer have ads?

Neither Interval Workout Fitness Timer nor MuscleTrainingTimer shows ads.

### Which is updated more often, Interval Workout Fitness Timer or MuscleTrainingTimer?

Interval Workout Fitness Timer ships an update monthly, and MuscleTrainingTimer every 9 days. Most recently, Interval Workout Fitness Timer was updated on November 6, 2026 and MuscleTrainingTimer on November 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.*