Magneto-Scope (Ad Free) app
Visual Metal Detector
This software is beta, you are welcome to try it but it may have problems.
Warning: Do not use this app to find hidden cables or pipes - it may not detect them.
A fast phone or tablet is highly recommended. The OpenCV library is also required, you will be prompted to install it if you have not already done so. Currently 64 bit Android versions are not fully supported by OpenCV.
This app uses the camera to detect movement of the device.
These images are temporarily stored in the device's memory, they are not saved to either the internal storage or to the SD Card nor are they transmitted to any other location.
There is also a ad supported version.
The following permissions are used:
Camera - Needed for motion tracking, similar to the way a mouse works.
Internet - Used to share your scans.
Photos / Media / Files & Storage - Allows you to save your scans.