# Crystal Lab vs Model Prisoner

The clearest difference is in-app purchases: Model Prisoner at none against Crystal Lab's 1. Model Prisoner also leads on update cadence (every 2 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Crystal Lab sells 1 one-off in-app purchase. Model Prisoner asks for nothing beyond the download.

Crystal Lab ships an update every 3 weeks, Model Prisoner every 2 days. The most recent releases landed on October 13, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Crystal Lab | Model Prisoner |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Size | 105 MB | 42 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Richard Menezes](https://appshunter.io/developer/1836283091) | [KYUNGROK KIM](https://appshunter.io/developer/6785047318) |

## What reviewers say

### Crystal Lab

[App page](https://appshunter.io/ios/app/crystal-lab/id6766129019)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remover anúncios | $1.99 | one-time |


### Model Prisoner

[App page](https://appshunter.io/ios/app/model-prisoner/id6797208807)

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

**In-app purchases:** none


## Frequently asked questions

### Is Crystal Lab free?

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

### Is Model Prisoner free?

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

### Do Crystal Lab or Model Prisoner have ads?

Both Crystal Lab and Model Prisoner show ads.

### Which is updated more often, Crystal Lab or Model Prisoner?

Crystal Lab ships an update every 3 weeks, and Model Prisoner every 2 days. Most recently, Crystal Lab was updated on October 13, 2026 and Model Prisoner on September 29, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*