MetalHunt: Wall Stud Finder
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About this app
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.
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.
See what’s behind the wall before you drill
Updated on
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
- No data shared with third partiesLearn more about how developers declare sharing
- No data collectedLearn more about how developers declare collection
What’s new
2.0 is the biggest update since launch.
- Wall Map: grid-scan a whole wall and save the heat map (beta)
- PDF report and printable worksheets
- EMF Inspector: appliance readings next to typical ranges
- Lab Mode: five magnetometer experiments
- Stud Assist: tells a stud edge from a pipe
- Sonar audio, peak hold, widget
- Still fully offline, still no ads, accounts or tracking
- Wall Map: grid-scan a whole wall and save the heat map (beta)
- PDF report and printable worksheets
- EMF Inspector: appliance readings next to typical ranges
- Lab Mode: five magnetometer experiments
- Stud Assist: tells a stud edge from a pipe
- Sonar audio, peak hold, widget
- Still fully offline, still no ads, accounts or tracking
Everyone
Learn moreApp support
About the developer
lapnito.cz s.r.o.
tom@lapnito.cz
Tři Dvory 32
784 01 Litovel
Czechia
+420 720 418 581
