The app "الدولة الاموية والدولة العباسي" is an educational reference app available on the Android platform. It provides educational information about the Umayyad and Abbasid dynasties, including brief summaries about the caliphs of both dynasties.

The app covers the Umayyad dynasty in Damascus and Andalusia, as well as the Abbasid era. Users can learn about the duration of the caliphs' reigns and other important historical facts about both dynasties.

Overall, the app is a great source of information for those interested in learning about the history of the Umayyad and Abbasid dynasties. The app is free to download and use, and it is a good choice for those who want to expand their knowledge of this historical period.