Smart USB Camera is an app that uses a mobile phone USB to connect an external camera and display the images captured by the external camera in the mobile app. Tips: 1. Smart Camera USB only supports USB camera connection 2. Smart Camera USB supports photo and video functions. Photos and videos can be found on the app. 3. Smart Camera USB supports full screen mode and angle rotation 4. Smart Camera USB On Android 9 and later, you need camera permissions to fully access USB video devices. Don't worry, this application does not include any functionality/code to access the built-in camera, as this is not necessary.