Find hidden studs and nails — then remember exactly where they are.

Screenshots

Features

Live magnetic trace

Slide your phone along the wall and watch the trace react in real time to screws, nails, and metal studs hiding behind. No guessing needed.

Calibrate in one second

Hold still on a bare wall patch for one second. The app measures the baseline and adapts the threshold to your environment automatically.

Three sensitivity levels

Tune the detector for plaster, drywall, or noisy environments. The adaptive threshold recalculates on the fly so you always stay in signal.

Save and compare scans

Label each scan — 'living room north wall' — and come back weeks later to see the full trace and every peak in microtesla. All data stays on your phone.

Haptics and tone

Feel every strong signal with haptics and an optional beep. You don't need to watch the screen while your hand is on the wall.

Buy once, keep forever

One purchase, no ads, no subscription, no account needed. Everything stays on your device. Privacy is the foundation.

FAQ

Can it really find studs?

StudSignal detects the magnetic response of metal fasteners — screws, nails, and metal studs create a strong signal. The app shows relative magnetic strength, not absolute position, so you know *where* the signal is strong, not *exactly* where to drill. Always verify with dedicated tools and common sense before drilling.

What about live wiring?

StudSignal cannot detect live electrical wiring or wood itself. Before drilling, always use a dedicated electrical tester to check for live wires in the wall. Metal studs and fasteners create the signals you see; AC wiring does not.

Where is my data stored?

All scans, labels, notes, and measurements are stored only on your device. Nothing is uploaded to any server. If you delete the app, your data is deleted with it. Back up important scans by exporting them before uninstalling.

How do I restore my purchase?

Open Settings inside the app and tap 'Restore Purchases'. As long as you're signed in with the same Apple Account you used to buy StudSignal, the app unlocks again at no charge — including on a new device.

Can I use it without an account?

Yes. There's no sign-up, no login, and no ads. You can use StudSignal entirely on your own. No account is needed to save and revisit scans.