# Go Muscu vs Koi Shape

The clearest difference is in-app purchases: Koi Shape at none against Go Muscu's 1. Koi Shape also leads on iOS requirement (15.1 vs 17.0). Go Muscu's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. Go Muscu sells 1 one-off in-app purchase. Koi Shape asks for nothing beyond the download.

Go Muscu ships an update every 2 weeks, Koi Shape monthly. The most recent releases landed on October 15, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Go Muscu | Koi Shape |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Monthly |
| Size | 4 MB | 26 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Maxime Haeyaert](https://appshunter.io/developer/1274130669) | [QUY DIEN LE](https://appshunter.io/developer/1745588028) |

## What reviewers say

### Go Muscu

[App page](https://appshunter.io/ios/app/go-muscu/id6499366811)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Mode | Free | one-time |


### Koi Shape

[App page](https://appshunter.io/ios/app/koi-shape/id6745516636)

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

**In-app purchases:** none


## Frequently asked questions

### Is Go Muscu free?

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

### Is Koi Shape free?

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

### Do Go Muscu or Koi Shape have ads?

Koi Shape shows ads; Go Muscu does not.

### Which is updated more often, Go Muscu or Koi Shape?

Go Muscu ships an update every 2 weeks, and Koi Shape monthly. Most recently, Go Muscu was updated on October 15, 2026 and Koi Shape on October 16, 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.*