This Android application, named "net.bahja.osdElghaba," is a reference book that contains translations of the companions of the Prophet Muhammad. The book, written by Ibn Athir, is a comprehensive guide with more than 7,500 entries. The app provides detailed information about the companions, their backgrounds, and their contributions to the Islamic faith.

The book provides an alphabetical order of the companions and starts with a brief introduction to the concept of a companion. The author then mentions the sources he used for his research, followed by the name and lineage of the companion, their migration history, their experiences with Prophet Muhammad (PBUH), and their death and burial locations (if known). The book has been printed multiple times and is considered a valuable resource for Islamic history enthusiasts.

The developer of the app, Bahja.Net, has made it available for free on the Android platform. It falls under the Education and Reference category, specifically under the Books subcategory. The app is a great resource for anyone looking to learn more about the companions of the Prophet and their contributions to the Islamic faith.