# Magnetometer・Magnetic Field — Gauss meter, waveform & peaks

> Gauss meter, waveform & peaks (iPhone/iPad app by ZeroPlay Ltd..)

- Source: https://appshunter.io/ios/app/magnetometermagnetic-field/id6759484882 (this page in markdown: same URL + `.md`)
- Developer: [ZeroPlay Ltd.](https://appshunter.io/developer/1500119722)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.1 · 102 MB
- Languages: American English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France), German (Germany) and 23 more
- Released: 2026-06-04
- Data updated: 2026-08-26
- User reviews in markdown: https://appshunter.io/ios/app/magnetometermagnetic-field/id6759484882/reviews.md

## What is Magnetometer・Magnetic Field?

Magnetometer shows you the magnetic field your phone can already sense. Calibrate a local baseline, then watch how far the field moves away from it — live, in microtesla (µT).

How it reads
• The big number is deviation from your calibrated baseline in µT, not an absolute field value
• An arc gauge moves through four states: Weak, Moderate, Strong and Peak
• A rolling waveform shows how the field changed over the last few seconds
• Raw X, Y and Z components are listed under the gauge in µT

Peaks you can feel
• A local peak — a rise followed by a fall — triggers a full-screen flash and haptic feedback
• A beep repeats faster and gets louder as the signal gets stronger, so you can watch where the phone is instead of the screen

Control the measurement
• Calibration establishes your local baseline and rates it: Excellent, Good, Fair or Poor
• Four sensitivity levels change how strongly the normalized signal is scaled
• High Precision filters noise harder — stronger smoothing, a stricter peak threshold and a longer debounce. Fewer false peaks and a slightly slower response; it does not amplify the signal
• Stop a scan yourself and it is saved as a summary: peak count, duration, mode and calibration quality. Up to 100 summaries stay on your device

Where people use a magnetometer
• Checking whether a screwdriver, scissors or a tool tip has become magnetised
• Comparing how strong different fridge magnets, speaker magnets or clasps are
• Seeing how the field around a running motor, speaker or appliance changes with distance
• Finding out whether a phone case, wallet or stand contains a magnet
• Physics homework and classroom demonstrations that need a live µT reading
• Simply seeing what the magnetic sensor inside your phone actually reports

What makes this magnetometer different
Most apps show one absolute number and leave you guessing whether it is high. This one asks you to calibrate where you are standing first, then reports the deviation from that baseline — so the reading answers "how much did the field change here" instead of "what is the field somewhere on Earth". The waveform, the four strength states and the peak flash all describe the same measured signal, and the app is explicit about what it cannot tell you.

Getting a clean reading
• Calibrate away from metal, magnets and electronics
• Move the phone slowly and steadily
• Take off cases that contain metal or magnets
• Recalibrate when you move to a different room or surface

What this app does not do
Magnetometer reports what the sensor reads. It cannot tell you what caused a reading, and it does not identify magnetic sources, objects, materials or where they are. It is not a stud finder, a wall scanner or a metal detector, and it makes no claim about anything behind a wall or any other surface. Readings depend on your device's magnetometer and on nearby interference — treat them as a relative guide, not as a professional measuring instrument or a structural inspection tool.

Your measurement summaries stay on this device. Requires a device with a built-in magnetometer. Available in 33 languages.

Some of the features described require a subscription.

Terms of Use: https://zeroplay.io/docs/legal/terms-of-service

Privacy Policy: https://zeroplay.io/docs/legal/privacy-policy

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly | $19.99 | per month |
| Weekly | $7.99 | per 7 days |



## Version history (last 2 releases)

### 1.1 — 2026-08-21

Bug fixes and performance improvements for a smoother experience.

### 1.0 — 2026-06-04

No release notes.

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All apps by ZeroPlay Ltd.: https://appshunter.io/developer/1500119722

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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 2026-08-26.*