Stud Finder: Wall Detector

This app will help you to detect studs. It uses the magnetometer to measure the magnetic field when your iPhone is placed near any metal objects.
INSTRUCTIONS: If your device has an external case then please remove it before using this app.
Does this app really work?
One way to check is to hold the phone close to a stainless steel knife and see that the indicator changes.
How it works?
The app uses the magnetometer to measure the magnetic field when your phone is placed near ferrous metal objects.
Features
- Calibrate the sensor when the readings are invalid.
- You can adjust the sensitivity to detect low or high variations.
- The hold button allows you to hold the read value until you press it again.