Comparison

ZAPPCHA vs Magnetometer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ZAPPCHA

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
Read full description

Using Zappcha to capture point clouds couldn’t be easier: • One touch to start scanning your object • Simply move your device slowly around whatever you are scanning, and tap again once done • Once your point cloud is captured, you can choose to save it to your device or to the Zappcha Cloud Note, for the highest fidelity point clouds, a LIDAR enabled iPhone/iPad should be used. Non-Lidar scanning is new experimental functionality intended to allow non-lidar phones to capture Zappcha is also capable of seamlessly displaying Point Clouds captured both on your device an elsewhere and of any size. The Zappcha app and the Zappcha Cloud are FREE to use, but if you need more storage space you can pay to upgrade your Zappcha Cloud account instantly – or indeed downgrade if you have more space than you need. Finally, the Zappcha Cloud integrates seamlessly with advanced point cloud editing and 3D design tools, including Veesus Arena4D, Rhino and SolidWorks. This enables professional users to integrate Zappcha into their existing 3D model workflows, augmenting them with cloud storage and the ability to create 3D scans quickly and conveniently from Apple devices.

About

Magnetometer

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
Read full description

Magnetometer is a fun app for finding metal or magnets by detecting EMF interference with your iPhone's compass heading. Find your keys, or just have fun discovering what could be made of metal. Magnetometer is not meant to replace an actual, professional-grade metal detector. Magnetometer presents simple information to the user about the interference experiences. For more scientific data, please turn to other great apps on the App Store. Magnetometer is made for fun and for experimental purposes and is not designed for scientific use. Also, don't drop your iPhone in sand hoping to find treasure; it's risky.

Screenshots

ZAPPCHA4 screens
Magnetometer4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
ZAPPCHA versus Magnetometer: the parameters behind the verdict, then further details
ParameterZAPPCHAMagnetometer
PriceFree — better$0.99
Rating3.0 (9 ratings)4.4 (13 ratings) — better
Positive reviews0.0% of reviews85.7% of reviews — better
Number of ratings913 — better
Update frequencyEvery 5 weeks — betterEvery 34 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad — betteriPhone
Requires iOS17.616.0 — better
Further details — not scored
Size39 MB2 MB
Age rating4+4+
DeveloperVeesus LtdBogdan Gavriluta

Customer experience

ZAPPCHA

All ratings9 ratings
Positive44.4%
Neutral11.1%
Negative44.4%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Magnetometer

All ratings13 ratings
Positive76.9%
Neutral15.4%
Negative7.7%
Written reviews7 reviews
Positive85.7%
Neutral14.3%
Negative0.0%

In-app purchases

None

ZAPPCHA

No in-app purchases

None

Magnetometer

No in-app purchases

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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