# Metal Detector Simulator Prank vs Grumpy Old Tech Robot Control

The clearest difference is ads: Grumpy Old Tech Robot Control at none against Metal Detector Simulator Prank's shown. Grumpy Old Tech Robot Control also leads on iOS requirement (10.3 vs 12.0). Metal Detector Simulator Prank's advantage is update cadence (every 4 months vs every 9 months). On price, 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.

Metal Detector Simulator Prank ships an update every 4 months, Grumpy Old Tech Robot Control every 9 months. The most recent releases landed on September 17, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Metal Detector Simulator Prank | Grumpy Old Tech Robot Control |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (59 ratings)](https://appshunter.io/ios/app/metal-detector-simulator-prank/id1286378592/reviews)** | — |
| Number of ratings | **59** | — |
| Positive reviews | 58.8% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 4 months** | Every 9 months |
| Monetization | Ad-supported | — |
| Size | 25 MB | 14 MB |
| Requires iOS | 12.0 | **10.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Denis Batishchev](https://appshunter.io/developer/1179896396) | [Inzant Australia PTY LTD](https://appshunter.io/developer/1491875116) |

## What reviewers say

### Metal Detector Simulator Prank

[App page](https://appshunter.io/ios/app/metal-detector-simulator-prank/id1286378592)

Transform your phone into a simulated metal detector for fun. Prank friends by pretending to find metal objects. Adjust signal strength with finger movements for interactive play.

**Highlights:** Simulated metal detection, Prank your friends, Adjustable signal strength, Interactive finger controls, Improvise and play games

**Features:** macOS Compatibility

**In-app purchases:** none


### Grumpy Old Tech Robot Control

[App page](https://appshunter.io/ios/app/grumpy-old-tech-robot-control/id1379828627)

**In-app purchases:** none


## Frequently asked questions

### Is Metal Detector Simulator Prank free?

Metal Detector Simulator Prank is free to download, with no in-app purchases.

### Is Grumpy Old Tech Robot Control free?

Grumpy Old Tech Robot Control is free to download, with no in-app purchases.

### Do Metal Detector Simulator Prank or Grumpy Old Tech Robot Control have ads?

Metal Detector Simulator Prank shows ads; Grumpy Old Tech Robot Control does not.

### Which is updated more often, Metal Detector Simulator Prank or Grumpy Old Tech Robot Control?

Metal Detector Simulator Prank ships an update every 4 months, and Grumpy Old Tech Robot Control every 9 months. Most recently, Metal Detector Simulator Prank was updated on September 17, 2026 and Grumpy Old Tech Robot Control on September 10, 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.*