HS-D2 is an Android app developed by Zheng Xiang that allows users to control a quadcopter with a wifi camera module and display real-time video footage. This app is categorized as Lifestyle and is compatible with AndroidThe app is available for free and offers a range of features.

The app supports VGA, 720P, and 1080P resolution, allowing users to view high-quality video footage. Additionally, the app offers the ability to take photos and record videos. One unique feature of HS-D2 is the support for 3D function. Overall, HS-D2 is a fun app that allows users to control a quadcopter and view real-time video footage with ease.