How FSRS Works: The Science Behind Govorly's Flashcards
How FSRS Works
Spaced repetition is one of the most well-established techniques in learning science. But not all spaced repetition systems are created equal.
The problem with traditional SRS
Most flashcard apps use SM-2, an algorithm from the late 1980s. While effective, SM-2 has known limitations: it doesn’t adapt well to individual learners, it over-reviews easy cards, and it under-reviews difficult ones.
Enter FSRS
The Free Spaced Repetition Scheduler (FSRS) is a modern algorithm developed by open-source researchers. It uses a mathematical model of human memory to predict exactly when you’ll forget a card.
Key advantages
- Personalized scheduling: FSRS adapts to your individual memory patterns
- Fewer reviews, better retention: You spend less time reviewing cards you already know
- Mathematically grounded: Based on the DSR (Difficulty, Stability, Retrievability) model of memory
How Govorly uses FSRS
Every flashcard in Govorly is scheduled by FSRS. As you review cards and provide feedback, the algorithm learns your memory patterns and adjusts review intervals accordingly.
The result: you spend less time reviewing and retain more of what you learn.