# MainframeMonitor — Retro CRT System Monitor

> Retro CRT System Monitor (iPhone/iPad app by Ralf Langhoff.)

- Source: https://appshunter.io/ios/app/mainframemonitor/id6809454680 (this page in markdown: same URL + `.md`)
- Developer: [Ralf Langhoff](https://appshunter.io/developer/1706183785)
- Category: Utilities, Entertainment
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 22 MB
- Languages: American English
- Released: 2026-09-10
- Data updated: 2026-09-22
- User reviews in markdown: https://appshunter.io/ios/app/mainframemonitor/id6809454680/reviews.md

## What is MainframeMonitor?

Turn your iPhone into a mainframe from the golden age of computing.

MAINFRAME MONITOR shows your device's live stats wrapped in a nostalgic CRT console – complete with phosphor glow, scanlines, a boot sequence and satisfying key clicks. Choose between classic GREEN or warm AMBER, each with its own matching app icon.

■ LIVE SYSTEM MONITOR
• Battery, CPU, memory and free storage
• Uptime, network status and device info
• All in real time, right on the glowing screen

■ HOME SCREEN WIDGET
• Keep your key system stats always in view
• In the same retro CRT style

■ REAL MAINFRAME FEELING
• Authentic boot sequence on launch
• Scanlines, glow and CRT effects
• Terminal-style PF function-key controls

■ HIDDEN CLASSIC GAMES
• Snake, Hamurabi, Void Patrol and Bagels
• Text-based retro games, just like on the old terminals

■ FAIR & PRIVATE
• Completely free
• No ads, no trackers, no accounts
• All data stays on your device

Whether as a stylish system monitor, a home screen widget or a hands-on piece of computing history – MAINFRAME MONITOR brings back the charm of the old data centers.

Made with attention to detail. Be sure to check out my other apps right inside the app.


## Version history (last 1 release)

### 1.0 — 2026-09-10

No release notes.

## More apps by Ralf Langhoff

- [KennzeichenInfo](https://appshunter.io/ios/app/kennzeicheninfo/id6464530345)
- [AirlineTrivia](https://appshunter.io/ios/app/airlinetrivia/id6736486556)
- [VectorBattle](https://appshunter.io/ios/app/vectorbattle/id6764048451)
- [LissajousRacer](https://appshunter.io/ios/app/lissajousracer/id6786025848)

All apps by Ralf Langhoff: https://appshunter.io/developer/1706183785

## Related topics

[mainframe](https://appshunter.io/ios/topics/mainframe)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-22.*