* Our response via comments goes to update section of your gmail app* Detect Hidden spy camera using hidden camera detector app : Magnetometer feature need to have magnetic sensor in your phone, other wise this feature will not work. How to use this app. How to find camera ? Move app near to any device that you have doubt. For example - shower, flowerpot, lens looking part or changing room mirror. This app analyse the magnetic activity around the device. If magnetic activity seems similar to