Bói Dịch - Nhâm Cầm Độn Toán is a lifestyle app developed by PlayUp Studios for Android users. This app is free of charge and falls under the category of fortune-telling. The app is an attempt to provide users with an accurate and reliable method of divination, based on traditional Vietnamese practices.

The app takes its inspiration from the positive feedback of its predecessors, Quan Thánh Linh Xăm and Bói Kinh Dịch. The app developers have attempted to create a more refined and improved version of these apps, with the hope of receiving constructive feedback from users to further enhance the quality of their products. The app is based on ancient divination methods used by saints and rulers of the past, such as Vua Phục Hy, Vua Văn Vương, Đức Chu Công, and Đức Khổng Tử.