# System Rx vs TavKey

The clearest difference is update cadence: System Rx at every 3 weeks against TavKey's every 2 months. System Rx also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

System Rx ships an update every 3 weeks, TavKey every 2 months. The most recent releases landed on September 24, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | System Rx | TavKey |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 2 MB | 6 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mohamed Saud](https://appshunter.io/developer/1797283594) | [Yaron Shemesh](https://appshunter.io/developer/6790495661) |

## What reviewers say

### System Rx

[App page](https://appshunter.io/ios/app/system-rx/id6761538119)

**Features:** Vision Pro support

**In-app purchases:** none


### TavKey

[App page](https://appshunter.io/ios/app/tavkey/id6790495659)

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

**In-app purchases:** none


## Frequently asked questions

### Is System Rx free?

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

### Is TavKey free?

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

### Do System Rx or TavKey have ads?

Neither System Rx nor TavKey shows ads.

### Which is updated more often, System Rx or TavKey?

System Rx ships an update every 3 weeks, and TavKey every 2 months. Most recently, System Rx was updated on September 24, 2026 and TavKey on September 29, 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.*