# PhoneDiagnostix vs MainframeMonitor

The clearest difference is update cadence: MainframeMonitor at fortnightly against PhoneDiagnostix's monthly. 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.

PhoneDiagnostix ships an update monthly, MainframeMonitor fortnightly. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | PhoneDiagnostix | 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 | Monthly | **Fortnightly** |
| Monetization | — | Free |
| Size | 2 MB | 24 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sebastian Kirschner](https://appshunter.io/developer/1891177110) | [Ralf Langhoff](https://appshunter.io/developer/1706183785) |

## What reviewers say

### PhoneDiagnostix

[App page](https://appshunter.io/ios/app/phonediagnostix/id6761736690)

**Features:** macOS Compatibility, 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

**In-app purchases:** none


## Frequently asked questions

### Is PhoneDiagnostix free?

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

### Is MainframeMonitor free?

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

### Do PhoneDiagnostix or MainframeMonitor have ads?

Neither PhoneDiagnostix nor MainframeMonitor shows ads.

### Which is updated more often, PhoneDiagnostix or MainframeMonitor?

PhoneDiagnostix ships an update monthly, and MainframeMonitor fortnightly. Most recently, PhoneDiagnostix was updated on October 10, 2026 and MainframeMonitor on October 24, 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.*