Magnetometer+
Metal Detector · µT/mT/Gauss
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Turn your phone into a magnetometer and metal detector. Read magnetic fields in µT/mT/Gauss, scan for hidden metal, and log your readings.
Magnetometer+ turns your iPhone into a precise magnetic field meter with three purpose-built modes — and now keeps a full history of every reading.
THREE MODES
• Auto — radial gauge with raw total field magnitude.
• Earth Field — total field with latitude band (low / normal / elevated / high).
• Metal Detector — baseline-calibrated detection with intensity verdict (no metal / weak / detected / strong / large) and live haptic feedback.
WHAT'S NEW
• ⌖ Zero Calibration — capture your environment's device-internal field bias as the 0 reference, so subsequent readings show only deviation. Just like a real metal detector.
• Haptic Feedback — Metal mode pulses faster and stronger as you approach ferrous objects. Toggle on/off from main screen.
• Unit Toggle — switch between µT, mT and Gauss with a single tap.
• GPS Tagging — optionally tag saved measurements with location coordinates.
• Measurement History — every reading is auto-saved with a 7-day trend chart and insights like "+12% vs your 7-day average".
• Notes & Favorites — add a note ("wall stud", "buried pipe") and star to any saved reading.
• Compare Mode — pick two saved readings and view the difference side by side.
• Share Result — share your current reading as an image.
• CSV Export — share all your measurements as CSV for spreadsheets.
CORE FEATURES
• Real-time 3-axis magnetic field measurement
• Kalman-smoothed sensor readings
• Min/Max/Avg/Peak tracking with elapsed time
• Sensitivity adjustment 0.5x – 2.0x
• Total field magnitude + per-axis components
• Reference library: Earth field bands, metal intensity classes
HONEST TECH NOTE
iPhone magnetometers are uncalibrated and include device-internal bias (~300–450 µT from speaker / motor / battery magnets). The ⌖ Zero button captures that bias so subsequent readings reflect only field changes in your environment — same workflow as a physical metal detector.
FOR HOBBYISTS · DIY · STUD FINDING · TREASURE HUNTING · CABLE DETECTION · EDUCATION
Available in 14 languages.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
• New Scanner tab — metal detector mode with a live proximity gauge to find studs, wires, and hidden metal
• New History tab — save and review your magnetic-field readings
• Cleaner three-tab layout: Meter · Scanner · History
The developer, Kyu-Hee Jang, 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
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Kyu-Hee Jang
- Size
- 53.9 MB
- Category
- Productivity
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 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
- Age Rating
18+
- 18+
- Contains
Advertising
- Copyright
- Copyright © 2026 Simon Jang. All rights reserved.