# Caya Studio vs Rheii

The clearest difference is update cadence: Rheii at every 5 days against Caya Studio's every 2 weeks. Caya Studio's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

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

Caya Studio ships an update every 2 weeks, Rheii every 5 days. The most recent releases landed on October 10, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Caya Studio | Rheii |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 5 days** |
| Size | 74 MB | 26 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Caya studios pte ltd](https://appshunter.io/developer/1871402285) | [Hye Jin Kwon](https://appshunter.io/developer/1896705125) |

## What reviewers say

### Caya Studio

[App page](https://appshunter.io/ios/app/caya-studio/id6758201185)

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

**In-app purchases:** none


### Rheii

[App page](https://appshunter.io/ios/app/rheii/id6769975352)

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

**In-app purchases:** none


## Frequently asked questions

### Is Caya Studio free?

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

### Is Rheii free?

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

### Do Caya Studio or Rheii have ads?

Neither Caya Studio nor Rheii shows ads.

### Which is updated more often, Caya Studio or Rheii?

Caya Studio ships an update every 2 weeks, and Rheii every 5 days. Most recently, Caya Studio was updated on October 10, 2026 and Rheii on October 5, 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.*