MetalHunt: Wall Stud Finder

MetalHunt turns your phone's magnetometer into a wall scanner. Hold the phone against a wall and it reads the magnetic field in microtesla, showing where iron studs, steel pipes, rebar, screws and nails bend the field — before you drill.

Calibrate first. Swing the phone in a figure eight until the app confirms it — until then a reading can show a find on an empty table.

NEW IN 2.0

- Wall Map. Scan a wall in a grid and get a heat map of the whole surface instead of one live number. Save a map for every wall and export it as an image. Wall Map is in beta: rows are divided by time rather than distance, so the map is faithful only if you sweep at an even pace.
- PDF report. Turn any scan into a document you can hand to a client or keep with your renovation notes.
- EMF Inspector. Measure the field around a microwave, router, fridge or bed, and read each result next to the typical published range for that appliance.
- Lab Mode. Five guided experiments with the raw magnetometer signal.
- Stud Assist. Classifies the shape of a signal so you can tell a stud edge from a pipe.
- Sonar audio feedback, peak hold, a home screen widget and quick actions.

WHAT IT FINDS

- Iron studs and steel framing before drilling
- Steel pipes and rebar in walls, floors and concrete
- Nails, screws, bolts and hidden hardware
- Magnets and steel tools
- Magnetic fields from motors, microwaves and transformers

WHAT IT CANNOT FIND

The phone's magnetometer reacts to ferromagnetic materials only: iron, steel and nickel. It cannot find gold, silver, copper, aluminium or brass, and no app on any phone can. It measures magnetic field strength, not depth, and it is not a medical or safety device. Always confirm with a proper stud finder before you drill.

PRIVACY

No accounts. No ads. No analytics. Nothing leaves your phone and the app works fully offline.

Built in Litovel, Czechia.