# System Rx vs MainframeMonitor

System Rx and MainframeMonitor are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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, MainframeMonitor fortnightly. Both last shipped on October 31, 2026.

## The numbers

| Metric | System Rx | MainframeMonitor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mainframemonitor/id6809454680/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | — | Free |
| Size | 2 MB | 22 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mohamed Saud](https://appshunter.io/developer/1797283594) | [Ralf Langhoff](https://appshunter.io/developer/1706183785) |

## What reviewers say

### System Rx

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

**Features:** Vision Pro support

**In-app purchases:** none


### MainframeMonitor

[App page](https://appshunter.io/ios/app/mainframemonitor/id6809454680)

Transform your iPhone into a vintage mainframe with a nostalgic CRT display. Monitor live system stats like battery, CPU, and memory, all within an authentic retro console experience. Includes hidden classic text-based games.

**Highlights:** Live system monitoring (battery, CPU, memory, storage), Home screen widgets, Authentic CRT effects (glow, scanlines), Retro boot sequence, Hidden classic text-based games, Customizable color themes (Green, Amber)

**Features:** macOS Compatibility, iPhone Duo support

**In-app purchases:** none


## Frequently asked questions

### Is System Rx free?

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

### Is MainframeMonitor free?

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

### Do System Rx or MainframeMonitor have ads?

Neither System Rx nor MainframeMonitor shows ads.

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

System Rx ships an update every 3 weeks, and MainframeMonitor fortnightly. Most recently, System Rx was updated on October 31, 2026 and MainframeMonitor on October 31, 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.*