# Kanji Rhythm vs Muscle Stack

The clearest difference is update cadence: Kanji Rhythm at daily against Muscle Stack's every 29 months. 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.

Kanji Rhythm ships an update daily, Muscle Stack every 29 months. Both last shipped on October 25, 2026.

## The numbers

| Metric | Kanji Rhythm | Muscle Stack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Daily** | Every 29 months |
| Size | 78 MB | 84 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Takayuki Shinohara](https://appshunter.io/developer/1552669383) | [omer cetin](https://appshunter.io/developer/1584332419) |

## What reviewers say

### Kanji Rhythm

[App page](https://appshunter.io/ios/app/kanji-rhythm/id1586513001)

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

**In-app purchases:** none


### Muscle Stack

[App page](https://appshunter.io/ios/app/muscle-stack/id1604565712)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Kanji Rhythm free?

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

### Is Muscle Stack free?

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

### Do Kanji Rhythm or Muscle Stack have ads?

Both Kanji Rhythm and Muscle Stack show ads.

### Which is updated more often, Kanji Rhythm or Muscle Stack?

Kanji Rhythm ships an update daily, and Muscle Stack every 29 months. Most recently, Kanji Rhythm was updated on October 25, 2026 and Muscle Stack on October 25, 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.*