Bismillah Androids has released an app on the Play Store called "নমজর হজর মসয়ল Namajer" which provides a comprehensive guide to the essential rules of Namaz and Hajj. The app includes 619 questions related to Azan, Aju, and Namaz, along with 10 famous questions related to the prayer. It also covers 195 questions related to Janaza Namaz, Imamate in Namaz, and 47 other important questions related to Namaz. The app also explains what to do when you miss Jumma Namaz, the rules for praying during travel, and the 19 reasons for invalidating Namaz.

Overall, the app is a great learning resource for Muslims who want to learn or improve their knowledge of Namaz and Hajj. The app also provides answers to many common questions related to prayer, which can help to clear up any confusion. The app is available for free on the Play Store and is compatible with Android 9.0.