Magnetic Sensor vs Magnet Meter

Magnetic Sensor turns your phone's built-in magnetometer into three precise tools: • Compass — A live, tilt-compensated compass with cardinal direction (N/E/S/W) and adjustable magnetic declination so the needle points to true north, not just magnetic north. • Metal Detector — Set a baseline reading anywhere, choose Low/Med/High sensitivity, and feel haptic pulses that get stronger as the field deviates. Perfect for finding studs in a wall, screws under drywall, or rebar in concrete. • Field Logger — Record samples at up to 60 Hz, then export to CSV via the share sheet. Saved recordings stay in the app for replay or re-export. KEY FEATURES • Live X / Y / Z axis readings + total field magnitude • Tilt-compensated heading using the accelerometer • Magnitude history sparkline + multi-channel chart • Rolling statistics: mean, standard deviation, RMS, range • Figure-8 calibration helper with quality indicator • Min / Max tracking with one-tap reset • Three sample rates: Slow (500 ms), Normal (100 ms), Fast (16 ms) • Light / Dark / System theme • English and Korean • Unit options: μT, mGauss, nT • Adjustable smoothing • Magnetic declination presets • Haptic alerts for the detector • Keep-screen-awake while recording • CSV export with full timestamp + per-axis data PRIVACY All sensor data is processed on-device and never leaves your phone. The app does not collect location, contacts, or personal information. Anonymous mobile advertising is used to keep the app free; you can watch a rewarded ad to unlock unlimited CSV sharing for the session. WHO IT'S FOR • Hobbyists exploring magnetic fields • DIYers detecting screws, studs, and rebar • Students collecting data for physics or geology projects • Hikers wanting a reliable phone compass • Anyone curious about the invisible field around them REQUIREMENTS A device with a magnetometer (most phones built since ~2013). The app cannot work on devices without one — it will tell you on launch.

Magnet Meter turns your iPhone's built-in magnetometer into a powerful magnetic field detector and metal finder. Sweep your phone over any surface and watch the live gauge, color heatmap, and audio tones react instantly as you close in on magnets, magnetized metal, and hidden magnetic anomalies. WHAT YOU CAN DO - Detector gauge: a big, easy-to-read radial meter shows magnetic field deviation in real time, with peak-hold so you never miss a spike. - Audio + haptic feedback: hear and feel the field get stronger, so you can scan without looking at the screen. - Axis view: see the raw X, Y, Z magnetic components and total field strength. - Waterfall: a scrolling history graph reveals how the field changes as you move. - Compass: a true-north compass that also shows how nearby metal bends the field. - AR Heatmap (Pro): paint magnetic field strength right into the space around you using your camera. WHAT IT FINDS Magnet Meter detects changes in the magnetic field. It is great for finding magnets, magnetized steel and iron, speaker magnets, hidden hardware, rebar, and magnetic studs. Because it measures magnetism, it does NOT detect copper pipes, aluminum, or live AC wiring. ZERO / CALIBRATE Tap Zero to capture the ambient field as your baseline, so only nearby objects register. A built-in calibration prompt helps keep readings on track. CUSTOMIZE - Multiple color maps and units (microtesla, gauss, milligauss) - Adjustable sensitivity - Clean, focused interface designed for one-handed sweeping MAGNET METER PRO A single one-time purchase (no subscription) unlocks the AR magnetic heatmap, CSV session export, a finer sensitivity floor, watermark-free sharing, and removes ads. Your purchase applies to your Apple ID across all your devices. IMPORTANT Magnet Meter is for educational and entertainment use only. Readings are relative and approximate and may be inaccurate. It is not a calibrated scientific or safety instrument: do not rely on it to locate live electrical wiring, gas lines, or any hazard. Requires a device with a magnetometer.