Magnetometer・Magnetic Field
Gauss meter, live µT waveform
Free · In-App Purchases · Designed for iPad. Not verified for macOS.
Magnetometer turns the sensor already inside your phone into a readable instrument. Calibrate a baseline where you are standing, then watch how far the magnetic field moves away from it — live, in microtesla (µT).
How to read it
• The large number is the deviation from your calibrated baseline in µT, not an absolute field value
• An arc gauge steps through four states: Weak, Moderate, Strong and Peak
• A rolling waveform shows how the field has changed over the last few seconds
• The raw X, Y and Z axis values sit under the gauge, also in µT
Peaks you can feel
• A local peak — a rise followed by a fall — sets off a full-screen flash and haptic feedback
• A beep repeats faster and grows louder as the signal strengthens, so you can keep your eyes on the phone rather than the screen
Control the measurement
• Calibration sets your local baseline and rates it Excellent, Good, Fair or Poor
• Four sensitivity levels change how strongly the normalised 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 kept as a summary with peak count, duration, mode and calibration quality. Up to 100 summaries stay on your device
What people measure with it
• Whether a screwdriver, scissors or a drill bit has picked up magnetisation
• How strong different fridge magnets, speaker magnets or bag clasps really are
• How the field around a running motor, speaker or appliance falls away with distance
• Whether a phone case, card wallet or stand has a magnet inside it
• Physics coursework and classroom demonstrations that need a live µT figure
• Plain curiosity about what the magnetic sensor in your handset actually reports
Why the reading is relative
Most magnetometer apps print one absolute number and leave you to guess whether it is high. This one asks you to calibrate first, then reports the deviation from that baseline — so the figure answers "how much has the field changed here", not "what is the field somewhere on Earth". The waveform, the four strength states and the peak flash all describe that same measured signal, and the app stays 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 containing 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 handset's magnetometer and on nearby interference — treat them as a relative guide, not as a professional measuring instrument or a structural survey 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
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
Bug fixes and performance improvements for a smoother experience.
The developer, ZeroPlay Ltd., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- ZeroPlay Ltd.
- Size
- 106.8 MB
- Category
- Productivity
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 32 more
- English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Monthly USD 11.99
- Weekly USD 5.99
- Copyright
- © ZeroPlay Ltd.