This application is a very basic operating program for a USB borescope (endoscope), taking photos or videos, and adjusting camera parameters Brightness, Gamma, Hue, Contrast, Saturation and Sharpness. It is mainly designed for inspecting barrels of hunting guns. But, it can be used for any bore inspection. Since not all android smart cellphones or tablets support USB camera, this application will not work for some models (for example, Samsung of android 5.1.1, Huawei of android 5.1.1) . The best tool to test if your mobile device supports USB Borescope is a free app available at Google Play Store, USB Camera Detector (https://play.google.com/store/apps/details?id=net.shop1234.androidthings.usbenum). Your photos taken by this usb bore camera are at Main Storage / DCIM/borescope, and videos at Main Storage /Movies/borescope of your device.