3AM is an iPhone application designed to provide an improved reading experience for fanfiction enthusiasts accessing content from Archive of Our Own (AO3). Users can discover new fics through tailored recommendations and flexible filtering options. The app allows for comfortable reading with customizable themes, fonts, and sizes, while also enabling users to pick up where they left off, manage their reading progress, and maintain a to-read list.

In addition to its reading features, 3AM facilitates engagement with the AO3 community by allowing users to view author profiles, read comments after each chapter, and easily return to AO3 to leave kudos or comments. The app is ad-free, offers unlimited reading, and includes a sleep reminder to encourage healthy reading habits. It accesses only publicly available content and stores user data locally, ensuring compliance with creator rights and privacy.