Smart Books' Энг гўзал салавотлар is an Android app that provides a collection of beautiful prayers, du'as, and dhikr for Muslims. The app includes a variety of features, including the 40 hadiths of Imam Nawawi, Tasbeeh, and Istighfar. The book's author, Mirzo Amad Khushnazar, has curated a collection of the most beautiful and essential prayers for every Muslim.

The app also includes the 40 hadiths of Imam Nawawi, which are considered one of the most important collections of hadiths. Additionally, the app provides Tasbeeh and Istighfar, making it a complete package for anyone looking to improve their spiritual practice. The prayers and du'as in the app have been sourced from islom.uz, ensuring their authenticity.

Overall, Энг гўзал салавотлар is an excellent resource for anyone looking to improve their spiritual practice through beautiful prayers and dhikr. The app is completely free and can be downloaded from the Google Play Store.