Red Book Lookup is a free Android app developed by DHV that provides a range of features for real estate information. It allows users to look up information and location of the red book by the number of sheets or the number of plots recorded on the book. Currently, it supports 12 provinces and cities in Vietnam, including Ho Chi Minh City, Da Nang, Khanh Hoa, and Long An, and will be updated regularly.

The app also enables users to find the location of the land by X-Y coordinates (VNrecorded on the red book, and they can quickly search by scanning the X-Y coordinate table on the red book using the camera. Moreover, users can convert VN 2000 coordinates to GPS coordinates usable on common maps, view real estate news, and look up the list of symbols for land use purposes. The app also provides the option to save favorite lookup lists and sign in to sync usage across multiple devices.