Stud Finder Pro: Stud Sensor
Find Studs Behind Drywall Fast
Only for iPhone
Free · In‑App Purchases
iPhone
Find the stud, drill the hole, hang the shelf. Your phone's magnetometer locates nails and screws inside the wall.
Measure twice. Drill once.
Stud Finder Pro turns your iPhone's built-in magnetometer into a precision wall scanner, the same sensor that powers your compass, calibrated to find the nails and screws inside drywall, plaster, and lath.
Take the case off. Hold the top of your phone flat to the wall. Slide slowly. The signal climbs as you cross a screw, peaks dead-center, and drops on the other side. Mark the peak. That is your stud.
Built for the moment between picking up the drill and committing to the hole.
WHAT'S INSIDE
A real-time magnetic-field readout in microteslas. A clean amber arc gauge that sweeps from idle to peak as you cross metal. Audio feedback that climbs with the signal so you can scan without watching the screen. Haptic confirmation at peak. A two-second auto-calibration that zeros out the room before you start.
THE WAY IT WORKS
Your iPhone has a magnetometer near the top edge, the same sensor your compass app uses. Stud Finder Pro reads it forty times a second, watches for spikes against your calibrated baseline, and shows you exactly where the metal is. Wood studs themselves are not magnetic, but the screws and nails that fasten drywall to them are. Find the screw. The stud is centered around it.
HOW TO GET ACCURATE READINGS
Remove your phone case. Magnetic accessories, metal-rich cases, and watches all skew the magnetometer. Hold the top edge of your phone flat against the wall. Slide slowly and steadily. Calibrate first by holding still for two seconds in an open area away from metal.
WORKS ON
Drywall, plaster, lath, and most painted wall surfaces. Concrete walls with rebar register strong signals everywhere, which is not what the app is for.
DOES NOT DETECT
Wood directly. Plastic pipes. Live electrical current. Non-magnetic metals like copper or aluminum. This is a ferromagnetic detector, not an X-ray.
OFFLINE-FIRST PRIVACY
No accounts. No advertising trackers. The magnetometer data never leaves your device. Anonymous usage analytics through TelemetryDeck only, no personal identifiers, no cross-app tracking.
PRO TOOLKIT
Pro unlocks unlimited scans, calibration memory, and the full-precision experience without any session limits. One payment, yours forever.
Terms of Use: https://cmlapps.github.io/studfinder/terms.html
Privacy Policy: https://cmlapps.github.io/studfinder/privacy.html
Support: https://cmlapps.github.io/studfinder/support.html
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- Performance Improvement
The developer, Cloud Motion Lab LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Cloud Motion Lab LLC
- Size
- 7.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Cloud Motion Lab LLC