Federdeck is a lightweight study companion for building and sharing spaced repetition decks on the AT Protocol.
Create decks of flashcard items, organize them into pathways (ordered courses like Duolingo units), and study with four modes: sequential (fixed order), random (shuffled), spaced repetition (SM-2 scheduling), and algorithmic (IRT-based difficulty ordering). All data lives on your Personal Data Server—you own it.
See the Research page for the whitepaper, lexicons, and data access guides.
