Get a cleaner signal.

Remove MagSafe accessories when practical, move away from chargers, speakers, motors, and the object you want to scan, then hold the iPhone still while the baseline is measured.

The magnetometer senses a three-dimensional field that includes Earth’s magnetic field. The App uses a corrected reference frame, but nearby electronics, calibration quality, and rapid movement can still affect a reading. Move slowly and compare the same iPhone edge and orientation.

It responds best to magnets and nearby iron or steel that alter the local magnetic field. A reading does not prove what an object is made of. Gold, silver, copper, aluminium, and other materials may produce little or no change.

They describe the change from the baseline measured in your current surroundings. They are relative signal bands—not object identity, depth, distance, value, or a safety judgment.

Move away from magnetic accessories, metal furniture, speakers, chargers, motors, and other electronics. Hold the iPhone still and choose Recalibrate. A different room or surface can help.

Move one edge of the iPhone slowly toward and away from the object while watching the change from baseline. Keep the same orientation during a comparison because sensor placement varies by model.

Sensitivity changes how much deviation is needed before the App labels a signal Elevated or Strong. It does not increase the physical range or power of the iPhone sensor.

No. The App is not a utility locator, stud finder, security scanner, electrical tester, medical device, or certified detector. Use the correct professional instrument and qualified guidance for safety-critical work.

Your first completed scan is free. Calibration or opening the App does not consume it. It is recorded only after you collect valid live readings and choose Finish Scan.

Lifetime access unlocks additional scans on the Apple Account that made the non-consumable purchase. It is a one-time purchase, not a subscription, and does not renew.

Choose Restore Purchases on the lifetime-access screen or in Settings. Use the Apple Account that made the original purchase. App Store access may be required.

Apple processes purchases and eligible refunds. Review eligibility or start a request at reportaproblem.apple.com.

No. Raw readings, baseline values, scan history, and completed results are processed in memory and are not saved or sent to the publisher.

Apple provides magnetometer data through its motion APIs. The permission allows the App to read that sensor; it does not give the App your location, camera, photos, contacts, or microphone.