# BK vs System Rx

The clearest difference is update cadence: System Rx at every 3 weeks against BK's every 3 months. BK's advantage is iOS requirement (9.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

BK ships an update every 3 months, System Rx every 3 weeks. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | BK | System Rx |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 2 MB | 2 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Open Road Solutions, Inc.](https://appshunter.io/developer/1445494820) | [Mohamed Saud](https://appshunter.io/developer/1797283594) |

## What reviewers say

### BK

[App page](https://appshunter.io/ios/app/bk-t1-tool/id1458588111)

**Features:** macOS Compatibility

**In-app purchases:** none


### System Rx

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

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is BK free?

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

### Is System Rx free?

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

### Do BK or System Rx have ads?

Neither BK nor System Rx shows ads.

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

BK ships an update every 3 months, and System Rx every 3 weeks. Most recently, BK was updated on October 14, 2026 and System Rx on October 11, 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.*