40 Hadith an-Nawawi is an educational and reference app developed by IslamBooks for Android devices. The app is designed to help users memorize hadith from the famous collection of Imam an-Nawawi. It features only the texts of hadith in English and Arabic with reference to sources. The app also includes sound accompaniment for easy memorization.

The app is free to download and use, with no ads. It serves as a helpful tool for those who are interested in memorizing and learning the hadith. The app's user-friendly interface makes it easy to navigate through the different hadith and the sound accompaniment feature adds an extra layer of assistance for those who prefer to learn by listening. Overall, 40 Hadith an-Nawawi is a great addition to any Muslim's digital library.