# µMagnetometer vs Protractor (Virtual & Simple)

The clearest difference is update cadence: µMagnetometer at every 4 months against Protractor (Virtual & Simple)'s every 53 months. µMagnetometer also leads on iOS requirement (11.0 vs 15.6). Protractor (Virtual & Simple)'s advantage is price ($0.99 vs $1.99). On ads, in-app purchases and device support there is nothing between them.

µMagnetometer costs $1.99 and Protractor (Virtual & Simple) $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

µMagnetometer ships an update every 4 months, Protractor (Virtual & Simple) every 53 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | µMagnetometer | Protractor (Virtual & Simple) |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| Rating | **[4.4 (66 ratings)](https://appshunter.io/ios/app/magnetometer/id1482576105/reviews)** | — |
| Number of ratings | **66** | — |
| Positive reviews | 23.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 53 months |
| Monetization | Paid | — |
| Size | 15 MB | 0 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dmytro Hrebeniuk](https://appshunter.io/developer/1458758581) | [Systemiko Inc.](https://appshunter.io/developer/680630947) |

## What reviewers say

### µMagnetometer

[App page](https://appshunter.io/ios/app/magnetometer/id1482576105)

Measures the strength of the magnetic field around you using your device's magnetometer. Requires Location Services to be enabled on iOS. Provides microtesla readings for nearby magnetic fields.

**Highlights:** Measures magnetic field strength, Displays readings in microteslas, Utilizes device magnetometer, Requires Location Services (iOS)

**Features:** Vision Pro support

**In-app purchases:** none


### Protractor (Virtual & Simple)

[App page](https://appshunter.io/ios/app/protractor-virtual-and-simple/id1551808458)

**In-app purchases:** none


## Frequently asked questions

### Is µMagnetometer free?

µMagnetometer costs $1.99, with no in-app purchases.

### Is Protractor (Virtual & Simple) free?

Protractor (Virtual & Simple) costs $0.99, with no in-app purchases.

### Do µMagnetometer or Protractor (Virtual & Simple) have ads?

Neither µMagnetometer nor Protractor (Virtual & Simple) shows ads.

### Which is updated more often, µMagnetometer or Protractor (Virtual & Simple)?

µMagnetometer ships an update every 4 months, and Protractor (Virtual & Simple) every 53 months. Most recently, µMagnetometer was updated on November 3, 2026 and Protractor (Virtual & Simple) on November 3, 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.*