# MagnetMeter — 3D Vector Magnetometer

> 3D vector magnetometer for visualizing and measuring magnetic fields. (iPhone/iPad app by Peter Breitling.)

- Source: https://appshunter.io/ios/app/magnetmeter/id346516607 (this page in markdown: same URL + `.md`)
- Developer: [Peter Breitling](https://appshunter.io/developer/286215120)
- Category: Navigation, Productivity
- Price: $1.99
- Rating: 4.50/5 from 4 App Store ratings · 88 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 13 MB
- Languages: American English, German (Germany)
- Released: 2009-12-18
- Data updated: 2026-08-29
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/magnetmeter/id346516607/reviews.md

## What is MagnetMeter?

The first and only Vector Magnetometer on the iPhone - Visualize the hidden world of magnetism around you in 3 dimensions (3GS or later!)! It can be perfectly used to explore and measure the direction and strength of the magnetic field of random objects around you (which can be quite fascinating!). With limitations (see docs) it can be used as a metal detector to find electric lines or pipes in walls (always good to check a wall before drilling in, at least better with this than not to check at all). Another application is to use this tool as a rough estimate of your north-south position on earth without using the GPS(!) - just by measuring the local earth magnetic declination (it works fine even while flying in a plane to check how the declination changes). Or simply explore your next Christmas present before opening it! Send us your results!


The application has four different displays modes to visualize the magnetic field:

- Absolute Mode: Displays the absolute magnetic field in microtesla (μT) measured by the magnetometer.

- North Mode: A compass head-up displays the geographic north along with the pointer that directs to the magnetic north (thus display difference magnetic to geographic north).

- Declination Mode: Two arrows will be displayed to indicate the declination of the earth magnetic field (0° just on equator, increasing to north with blue pointer direction up or south with blue pointer direction down). 

- Relative Mode: This mode shows the relative strength (absolute minus compensation vector) of the magnetic field in μT. 


… and five different display modes for acceleration visualization: 

- Absolute Mode: Displays the reverse acceleration of the iPhone (1g up when hold steady). 

- X-Rotation - Y-Rotation - Z-Rotation: The arrow will display the rotation around the X-, Y- and Z-Axis of the iPhone. The digital indicator shows the angle numerically (-180° - +180°). A way to calibrate will be added with one of the next updates, so you could use this as a level.

- Relative Mode: This mode shows the relative strength (absolute minus compensation vector) of the acceleration.


For a detailed documentation, please visit our product homepage. 


For recreational use only. However it CAN (!) be very accurate. The measurement is performed as good as possible (we try our best) by using the inbuilt accelerometer and magnetometer to their limits. The range of the accelerometer typically has a max of ±3g (~4.2g displayed here if combined) and each magnetometer usually recalibrates internally when over ±120μT in one axis. However, tell us your experience!

## Key features

- 3D magnetic field visualization
- Measure magnetic field strength and direction
- Metal detection for pipes and lines
- Estimate geographic north without GPS
- Four magnetic display modes
- Five acceleration visualization modes

## Recent user reviews (10 of 88)

All indexed reviews: https://appshunter.io/ios/app/magnetmeter/id346516607/reviews.md

### 5/5 — Instructif effectivement

*2021-10-14, version 1.9.1*

A mon tour de poster un avis, le précédent datant d’il y a 10 ans… En plus de montrer la direction du champ magnétique en 3D, je vous invite à le passer au-dessus d’un matelas à ressorts, vous serez sans doute surpris.

### 5/5 — Ottima applicazione

*2019-04-16, version 1.7*

Tutte le funzioni di accelerometro e magnetometro con le varie opzioni danno un chiara interpretazione dei valori e delle loro variazioni grazie al doppio display grafico e numerico.
Ovviamente la precisione dipende dalla risoluzione e offset del dispositivo su cui è installata l’applicazione.

### 1/5 — Keeps coming back

*2017-08-19, version 1.6*

It is terrible so I deleted it but it kept coming back to my home screen

### 3/5 — Can not calibrate

*2017-06-12, version 1.6*

On the iPad Pro the magnetic north is always wrong.
The app provides no way to force a calibration.

### 2/5 — Ruckelig

*2017-02-11, version 1.6*

Vor paar Jahren, auf dem iPad 3 lief die App geschmeidig, und war kostenlos, nun kostet sie 1,99€ und ruckelt auf dem iPhone 6S 🙄

### 5/5 — I Need This!

*2016-11-26*

Just when I thought I had everything. Definitely a cool app with a multitude of uses. Nice Interface good online manual and works exactly as advertised.

### 4/5 — Нужная вещь

*2016-01-28, version 1.5*

Полезная вещь и весьма редкая в AppStore

### 5/5 — Excellent after latest update

*2015-12-19, version 1.5*

I have used this app since the iPhone 3 came out to locate and find the orientation of hidden magnets. It stopped working for me after IOS 9 but the recent update has it working better than ever on an iPhone 6s Plus. I highly recommend it, especially with the new features.

### 5/5 — Super Awesome Magnetometer

*2015-09-30*

Very good app.  Impressive 3 dimensional magnetometer read out.  I was pleasantly surprised by how good this is and seems to be quite accurate and sensitive.  Well done.

### 5/5 — Top

*2015-09-28, version 1.5*

Funktioniert super! Selbst elektrische Leitungen lassen sich detektiere solane sie nah genug ans iPhone gehalten werden.
Verstehe allerdings die Pfeilrichtung nicht. Man bemerkt zwar Änderungen im Magnetfeld direkt aber der Peil bleibt immer gleich und nicht nach Norden ausgerichtet. Ist die Sensitivität absichtlich runtergeschraubt?

## Frequently asked questions about MagnetMeter

### What does the MagnetMeter app do?

MagnetMeter allows you to visualize magnetic fields in three dimensions around you. It measures the direction and strength of these fields, enabling you to explore objects, detect hidden electrical lines or pipes in walls, and even estimate your north-south position without relying on GPS.

### What are the different display modes available?

The app offers four display modes for magnetic field visualization: Absolute Mode shows the raw magnetic field strength, North Mode displays geographic and magnetic north, Declination Mode indicates the earth's magnetic field declination, and Relative Mode shows the adjusted magnetic field strength.

### Is this app free to use?

Based on the provided information, this application is a paid app. It does not have in-app purchases or advertisements, indicating a one-time purchase model for full functionality.

### What devices is MagnetMeter compatible with?

The application is designed for the iPhone and specifically requires a 3GS or later model to function. It utilizes the device's inbuilt accelerometer and magnetometer sensors.

### What are some common use cases for MagnetMeter?

Common uses include exploring the magnetic properties of everyday objects, acting as a rudimentary metal detector to locate wires or pipes before drilling, and as a navigational aid to determine your approximate north-south orientation by measuring local magnetic declination, even during flights.

## Version history (last 5 releases)

### 1.9.1 — 2020-01-03

- Support for all current iPhone and iPad models
- Bugfixes & performance optimizations
Thanks for your support!

### 1.7 — 2017-12-11

iPhone X Support

### 1.6 — 2016-11-11

• Sporadic freezes fixed
• Adaptions to iOS 10

Thanks for your feedback!

### 1.5 — 2014-10-29

- Updated interface
- iPhone 6 / 6 Plus support

### 1.4 — 2012-09-21

iPhone 5 support

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## More apps by Peter Breitling

- [Clinometer + bubble level](https://appshunter.io/ios/app/clinometer-plus-bubble-level/id286215117)
- [Contacts last entries & search](https://appshunter.io/ios/app/contacts-last-entries-and-search/id294325239)
- [Bubble level and Clinometer](https://appshunter.io/ios/app/bubble-level-and-clinometer/id304152770)
- [AccelMeter](https://appshunter.io/ios/app/accelmeter/id346525189)
- [iSetSquare](https://appshunter.io/ios/app/isetsquare/id382820922)

All apps by Peter Breitling: https://appshunter.io/developer/286215120

## Related topics

[peter breitling](https://appshunter.io/ios/topics/peter-breitling)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*