IronScope - Metal Detector
Magnetic Field · EMF Detector
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Measure local magnetic-field changes with your iPhone magnetometer. Calibrate baseline, watch µT readings, and export CSV offline.
IronScope uses your iPhone's built-in magnetometer to show nearby magnetic-field changes in microteslas (µT). It is a phone magnetometer field meter for close-range ferromagnetic objects, learning, and everyday curiosity. It is not a professional metal detector and must not be used for security screening, mining, infrastructure locating, or safety decisions.
KEY FEATURES
• Real-time magnetic field reading in µT
• Color-coded gauge with optional audio alert
• One-tap calibration to the local magnetic baseline
• Clear unavailable-state messaging on simulators or unsupported devices
• Fully offline — no network, no tracking, no ads, no account
PRACTICAL USES
• Observe field changes near keys, screws, magnets, and steel objects
• Compare magnetic and non-magnetic items at close range
• Demonstrate magnetism in a classroom or maker setting
• Check how magnetic cases, mounts, and accessories affect your phone
HOW IT WORKS
The iPhone magnetometer reads the ambient magnetic field. IronScope subtracts your calibrated baseline, often near Earth's natural 25–65 µT range, and shows nearby changes as excess signal. Readings vary by phone model, orientation, calibration, cases, magnets, and nearby electronics.
LIMITATIONS
Smartphone magnetometers are not professional metal detectors. Non-magnetic metals such as aluminum and copper may not change the reading. Deep or hidden objects are not reliable targets. Keep the phone away from strong magnets that could affect device sensors.
PRIVACY
Magnetometer readings are processed locally. No audio, video, location, analytics, ads, account, or tracking is used.
SUBSCRIPTION INFO
• Payment will be charged to your Apple ID account at confirmation of purchase.
• Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period.
• Your account will be charged for renewal within 24 hours prior to the end of the current period.
• You can manage and cancel your subscriptions by going to App Store → Account → Subscriptions.
Privacy Policy: https://frexx.top/ironscope/privacy.html
Terms of Use: https://frexx.top/ironscope/terms.html
SUPPORT
jie.xiang.jm@gmail.com
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
IronScope now adds Scan Confidence, a clearer read on sensor availability, baseline quality, signal excess, sampling mode, and the next action before you trust a reading. The Pro paywall also includes a direct Support link, while calibration, CSV export, privacy boundaries, and subscription IDs stay intact.
The developer, 杰 向, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 杰 向
- Size
- 594.9 KB
- Category
- Utilities
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 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 Simplified Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- IronScope Pro Weekly $1.59
- IronScope Pro Yearly $19.90
- Copyright
- © 2026 Clawbot