Hisnul Mumin is an iPhone application offering a collection of authentic Du'as (supplications) from the Quran and the Sunnah. Developed by SALIM NoorMohamed, this educational app is based on a book by Shaykh Abu Abdir-Rahman Abdillah bin Ahmad Al-Iryaanee. The app features an enhanced search function for easy access to Du'as and the ability to mark favorites.

Users can benefit from features such as Arabic text with English translations, customizable font selection, night mode reading, and optimized search capabilities. Additionally, the app allows for sharing Du'as individually or by chapter, and offers custom local push notifications without requiring an internet connection. The option to switch between English and Arabic languages enhances user experience.