40 Hadith An-Nawawi - الأربعون is an educational app that provides a comprehensive understanding of Islamic jurisprudence. The app, developed by Pak Appz, is available for Android users and is free of cost. The app contains a compilation of 40 hadiths by Imam al-Nawawi, which are mostly from Sahih Muslim and Sahih al-Bukhari. These hadiths are considered the foundation of Islamic sacred law or Sharīʿah and are described as being ‘the axis of Islam’ or ‘the half of Islam’ or ‘the third of it’ or the like. The app includes a detailed explanation of these hadiths by scholars like Ibn Rajab, Ibn Uthaymeen, and Abdul Karim al-Khudayr, along with other commentaries and grammatical explanations. The app also provides the option to listen to the hadiths.