DEERC D2 is a lifestyle app developed by Zheng Xiang for Android devices. This app allows users to control a quadcopter through a WIFI camera module and displays real-time video taken by the camera. The app offers three resolution options - VGA, 720P, and 1080P.

In addition to controlling the quadcopter, DEERC D2 also supports photo and video recording functions. Users can easily capture photos and record videos during the flight. Moreover, the app includes a 3D function, which adds a unique perspective to the video.

Overall, DEERC D2 is a fantastic app for quadcopter enthusiasts. It provides an excellent user experience with smooth and stable control, high-quality video transmission, and various functions to enhance the user's experience.