LIHKG 討論區 is a social networking app developed by LIHKG Limited for iOSand above. It is designed to promote free speech and open discussion on a wide range of topics including current events, entertainment, creativity, and daily life. The app features a user-friendly interface that supports a variety of screen sizes for both iPhone and iPad.

One of the standout features of LIHKG 討論區 is its multimedia browsing mode which allows users to view all the videos and photos related to a particular topic at once. Users can also customize the app's interface with black or white themes and choose their own backgrounds. Additionally, users can leave comments and subscribe to follow other members, making the LIHKG community a core element of the app.

LIHKG 討論區 also includes shortcuts to quickly access the user's favorite topics, a notification center to stay up to date with the latest discussions, and password protection to enhance privacy and security.