Xin số bằng Cầu Cơ is an Android application developed by Nguyễn Hồng Đức that falls under the Lifestyle category. The app is designed to predict lucky numbers for players of Xổ Số, a Vietnamese lottery game. It uses a simulation of the Cầu Cơ board to generate these lucky numbers for players who are not so lucky when it comes to picking numbers for the game.

The app is easy to use and provides players with a simple interface to access the lucky number predictions. It only focuses on predicting numbers for the Nam lottery, and players can use these predictions to increase their chances of winning. The app is available for free download on the Google Play Store and is a great tool for anyone looking to try their luck in the Xổ Số game.