AO3 Disco is a free iPhone application designed for avid fanfiction readers. It leverages machine learning technology to curate personalized recommendations from the vast collection of fanfiction available on Archive Of Our Own (AO3). Users can input a favorite fanfic directly from their browser, and the app generates a tailored list of suggested works based on their preferences. This feature allows readers to easily discover new stories that align with their interests.

The application falls under the Education & Reference category, specifically in the Books subcategory. While AO3 Disco is an unofficial app and not endorsed by the Organization for Transformative Works, it provides a valuable tool for enhancing the reading experience by connecting users with relevant fanfiction content. With its user-friendly interface and intelligent recommendation system, AO3 Disco is a must-have for fans of fan-created narratives.