# ZAPPCHA vs Magnetometer

The clearest difference is review sentiment: Magnetometer at 86% against ZAPPCHA's 0%. Magnetometer also leads on rating (4.4 vs 3.0). ZAPPCHA's advantage is price (Free vs $0.99) and update cadence (every 5 weeks vs every 34 months). On ratings volume, ads, in-app purchases and device support there is nothing between them.

ZAPPCHA is free to download; Magnetometer costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Magnetometer holds the better App Store score, 4.4 against 3.0. Both are backed by a comparable volume of ratings — 9 and 13 respectively. Written reviews point the same way: 0% of ZAPPCHA's written reviews are positive against 86% of Magnetometer's.

ZAPPCHA ships an update every 5 weeks, Magnetometer every 34 months. The most recent releases landed on October 9, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | ZAPPCHA | Magnetometer |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [3.0 (9 ratings)](https://appshunter.io/ios/app/zappcha-mobile-lidar-scanner/id1536910240/reviews) | **[4.4 (13 ratings)](https://appshunter.io/ios/app/magnetometer/id1662997574/reviews)** |
| Number of ratings | 9 | **13** |
| Positive reviews | 0.0% of reviews | **85.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 34 months |
| Monetization | **Free** | Paid |
| Size | 39 MB | 2 MB |
| Requires iOS | 17.6 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Veesus Ltd](https://appshunter.io/developer/1536910242) | [Bogdan Gavriluta](https://appshunter.io/developer/1584690995) |

## What reviewers say

### ZAPPCHA

[App page](https://appshunter.io/ios/app/zappcha-mobile-lidar-scanner/id1536910240)

Easily capture, view, and share 3D scans using your mobile device. Supports LiDAR-enabled devices for high-fidelity scans and offers cloud storage with optional upgrades for more space. Integrates with professional 3D design tools.

**Highlights:** One-touch 3D scanning, Cloud storage for scans, Seamless point cloud display, Integration with 3D design tools, Optional cloud storage upgrades, Experimental non-LiDAR scanning

**Features:** macOS Compatibility, Game Controller support

**In-app purchases:** none


### Magnetometer

[App page](https://appshunter.io/ios/app/magnetometer/id1662997574)

This application uses your iPhone's compass to detect electromagnetic interference, helping you find metal objects or magnets. It's designed for fun and experimental purposes, not as a professional tool. Discover hidden metal items or simply explore the magnetic fields around you.

**Highlights:** Detects metal and magnets, Uses iPhone's compass, Measures EMF interference, Fun and experimental use, Simple user interface

**In-app purchases:** none


## Frequently asked questions

### Is ZAPPCHA free?

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

### Is Magnetometer free?

Magnetometer costs $0.99, with no in-app purchases.

### Which has better reviews, ZAPPCHA or Magnetometer?

Magnetometer is rated higher. ZAPPCHA averages 3.0 out of 5 from 9 ratings, while Magnetometer averages 4.4 from 13 ratings.

### Do ZAPPCHA or Magnetometer have ads?

Neither ZAPPCHA nor Magnetometer shows ads.

### Which is updated more often, ZAPPCHA or Magnetometer?

ZAPPCHA ships an update every 5 weeks, and Magnetometer every 34 months. Most recently, ZAPPCHA was updated on October 9, 2026 and Magnetometer on October 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.*