# Regal Prosthesis vs Sauna Chill

The clearest difference is device support: Regal Prosthesis at 3 against Sauna Chill's 1. Regal Prosthesis also leads on iOS requirement (11.0 vs 16.4). On price, update cadence, 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.

Regal Prosthesis ships an update every 4 months, Sauna Chill every 2 months. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Regal Prosthesis | Sauna Chill |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Size | 25 MB | 64 MB |
| Requires iOS | **11.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Techland Computer Systems Limited](https://appshunter.io/developer/1218181620) | [Gym Flow Limited](https://appshunter.io/developer/1631161014) |

## What reviewers say

### Regal Prosthesis

[App page](https://appshunter.io/ios/app/regal-prosthesis/id1560920798)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sauna Chill

[App page](https://appshunter.io/ios/app/sauna-chill/id6748306370)

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

**In-app purchases:** none


## Frequently asked questions

### Is Regal Prosthesis free?

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

### Is Sauna Chill free?

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

### Do Regal Prosthesis or Sauna Chill have ads?

Neither Regal Prosthesis nor Sauna Chill shows ads.

### Which is updated more often, Regal Prosthesis or Sauna Chill?

Regal Prosthesis ships an update every 4 months, and Sauna Chill every 2 months. Most recently, Regal Prosthesis was updated on October 27, 2026 and Sauna Chill on October 30, 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.*