# 3/7法 vs MuscleTimerPro

The clearest difference is update cadence: 3/7法 at every 4 days against MuscleTimerPro's every 2 weeks. 3/7法 also leads on iOS requirement (11.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

3/7法 ships an update every 4 days, MuscleTimerPro every 2 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 3/7法 | MuscleTimerPro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Size | 24 MB | 56 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [devenue](https://appshunter.io/developer/1691267014) | [JIN TANDA](https://appshunter.io/developer/1865935191) |

## What reviewers say

### 3/7法

[App page](https://appshunter.io/ios/app/37/id6464152923)

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

**In-app purchases:** none


### MuscleTimerPro

[App page](https://appshunter.io/ios/app/muscletimerpro/id6757308856)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 3/7法 free?

3/7法 is free to download, with no in-app purchases.

### Is MuscleTimerPro free?

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

### Do 3/7法 or MuscleTimerPro have ads?

Neither 3/7法 nor MuscleTimerPro shows ads.

### Which is updated more often, 3/7法 or MuscleTimerPro?

3/7法 ships an update every 4 days, and MuscleTimerPro every 2 weeks. Most recently, 3/7法 was updated on November 3, 2026 and MuscleTimerPro on October 31, 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.*