# Grumpy Old Tech Robot Control vs Ghost Detector Pro

The clearest difference is in-app purchases: Grumpy Old Tech Robot Control at none against Ghost Detector Pro's 3. Grumpy Old Tech Robot Control also leads on device support (3 vs 1) and iOS requirement (10.3 vs 17.0). Ghost Detector Pro's advantage is update cadence (every 5 weeks vs every 9 months). On price and ads there is nothing between them.

Both are free to download. Ghost Detector Pro sells 3 in-app purchases, starting at $5.99 per 7 days. Grumpy Old Tech Robot Control asks for nothing beyond the download.

Grumpy Old Tech Robot Control ships an update every 9 months, Ghost Detector Pro every 5 weeks. The most recent releases landed on September 29, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Grumpy Old Tech Robot Control | Ghost Detector Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (33 ratings)](https://appshunter.io/ios/app/ghost-detector-pro-camera/id6755587034/reviews)** |
| Number of ratings | — | **33** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 5 weeks** |
| Monetization | — | Subscription |
| Size | 14 MB | 18 MB |
| Requires iOS | **10.3** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 9+ |
| Developer | [Inzant Australia PTY LTD](https://appshunter.io/developer/1491875116) | [Kai Chi Tsao](https://appshunter.io/developer/1299477756) |

## What reviewers say

### Grumpy Old Tech Robot Control

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

**In-app purchases:** none


### Ghost Detector Pro

[App page](https://appshunter.io/ios/app/ghost-detector-pro-camera/id6755587034)

This app uses AI and AR to visualize and detect paranormal entities in real-time. It monitors electromagnetic fields, audio, and uses LiDAR for enhanced perception. Capture evidence with photos and videos, and utilize protection features.

**Highlights:** Real-time ghost visualization with AR, Multi-sensor analysis (magnetic, audio, LiDAR), Adjustable detection intensity, Photo and video recording with watermark, Protection runes and mantras, Ad-free experience with Pro upgrade

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ghost Detector Full Weekly | $5.99 | per 7 days |
| Ghost Detector Annual | $24.99 | per year |
| Ghost Detector Pro Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Grumpy Old Tech Robot Control free?

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

### Is Ghost Detector Pro free?

Ghost Detector Pro is free to download, with in-app purchases available.

### Do Grumpy Old Tech Robot Control or Ghost Detector Pro have ads?

Neither Grumpy Old Tech Robot Control nor Ghost Detector Pro shows ads.

### Which is updated more often, Grumpy Old Tech Robot Control or Ghost Detector Pro?

Grumpy Old Tech Robot Control ships an update every 9 months, and Ghost Detector Pro every 5 weeks. Most recently, Grumpy Old Tech Robot Control was updated on September 29, 2026 and Ghost Detector Pro on September 27, 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.*