open-spaced-repetition/fsrs4anki on Hacker News

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Spaced Repetition Algorithm: A Three‐Day Journey from Novice to Expert

story by _j3xk · 2026-03-13 · 3 comments

…for supposedly better spaced repetition in profile/deck settings. This was an interesting read: https://github.com/open-spaced-repetition/fsrs4anki/wiki/Spa...

comment by fatihpense · 2026-02-22 · in What's the best way to learn a new language?

Yes. Stochastic gradient descent, to be precise. https://github.com/open-spaced-repetition/fsrs4anki/wiki/The...

comment by runarberg · 2026-02-03 · in Anki ownership transferred to AnkiHub

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Spaced Repetition Algorithm: A Three‐Day Journey from Novice to Expert

story by akbarnama · 2025-05-19 · 0 comments

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FSRS (Free Spaced Repetition Scheduler)

story by Bluestein · 2025-05-18 · 0 comments

SRS usually means "spaced repetition system", but FSRS stands for "Free Spaced Repetition Scheduler". https://github.com/open-spaced-repetition/fsrs4anki/wiki/ABC...

comment by Expertium · 2025-05-18 · in Spaced repetition systems have gotten better

…F is added without explaining what it stands for. Most references of the article do neither. Except https://github.com/open-spaced-repetition/fsrs4anki/wiki/The... which says the F means Free. Seems a little too easy? I found nothing else.…

comment by Gys · 2025-05-18 · in Spaced repetition systems have gotten better

…doesn't reset it back to being effectively new. If you want to understand the algorithm, read this: https://github.com/open-spaced-repetition/fsrs4anki/wiki/ABC...

comment by TheDong · 2025-05-18 · in Spaced repetition systems have gotten better

…- recommended number of cards per day to study based on some grassroots research https://github.com/open-spaced-repetition/fsrs4anki - the most modern spaced repetition algorithm which uses machine learning to optimize for each individual'

comment by rinvi · 2025-03-03 · in How I Ace Midterms at a Top CS School by Studying 1-3 Hours (and Skipping Class)

The app is using the same Anki FSRS algo its open source https://github.com/open-spaced-repetition/fsrs4anki Agreed would be swimming against the tide rolling a custom one. Anki's is awesome! This app functions much the same just makes…

comment by williamsss · 2025-02-10 · in Show HN: Ricotta – Language Learning to Replace Anki

…m/Amber-Williams/language-flashcard-app-gpt... Anki uses this FSRS which is an open sourced algorithm https://github.com/open-spaced-repetition/fsrs4anki

comment by williamsss · 2025-02-10 · in Show HN: Ricotta – Language Learning to Replace Anki

…(particularly rs-fsrs; which I think is used in Anki proper) as well as read the algorithm https://github.com/open-spaced-repetition/fsrs4anki/wiki/The... and infer by names being used. I complain here, but this is open source and if I was…

comment by runarberg · 2025-02-02 · in Spaced repetition can allow for infinite recall (2022)

…memory instead of using a one-size-fits-all approach. It is described in (much) more detail here: https://github.com/open-spaced-repetition/fsrs4anki/wiki/The...

comment by _Algernon_ · 2025-02-02 · in Spaced repetition can allow for infinite recall (2022)

Yes it exists and is called FSRS https://github.com/open-spaced-repetition/fsrs4anki/wiki

comment by Ey7NFZ3P0nzAe · 2024-12-28 · in Implementing SM-2 in Rust

Yes, it's FSRS based on this article https://github.com/open-spaced-repetition/fsrs4anki/wiki/Spa... Huge thanks to the dude.

comment by iskrataa · 2024-12-05 · in Show HN: I combined spaced repetition with emails so you can remember anything

…w.reddit.com/r/Anki/comments/17u01ge/spaced_repeti... They expand their work on their GitHub as well. https://github.com/open-spaced-repetition/fsrs4anki/wiki/Spa...

comment by iskrataa · 2024-12-05 · in Show HN: I combined spaced repetition with emails so you can remember anything

…to people who come up with innovative decks or just well written and focused cards. ----- [*] https://github.com/open-spaced-repetition/fsrs4anki/wiki/ [**] https://forums.ankiweb.net/t/pass-fail-grading-as-default/…

comment by pessimizer · 2024-10-04 · in 12 Months of Mandarin

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Show HN: Respeakable.com – A good AI Language Tutor

story by nicowaltz · 2024-09-08 · 2 comments

…they took down the app for some compliance thing. [0] https://github.com/fasiha/ebisu [1] https://github.com/open-spaced-repetition/fsrs4anki

comment by rsanek · 2024-06-25 · in Ask HN: How has AI changed your learning methods?

Is your "recall probability estimating algorithm" similar to FSRS's retrievability? https://github.com/open-spaced-repetition/fsrs4anki/wiki/ABC... If you ever feel like moving beyond the Apple market you might look into…

comment by AlexErrant · 2024-04-08 · in Show HN: Flash Notes – Flashcards for Your Notes, LLM, iOS/macOS Sync

…app might not be as good, though I wouldn't know because I haven't given it a good try yet. [1] https://github.com/open-spaced-repetition/fsrs4anki/blob/mai... [2] https://www.youtube.com/watch?v=OqRLqVRyIzc

comment by lb4r · 2024-02-21 · in LaTeX and Neovim for technical note-taking

... https://github.com/open-spaced-repetition/fsrs4anki/wiki/The... ... I'm not sure I believe we understand our own learning/memory anything like enough for this not to be total pseudoscience? Reminds me of A Beautiful Mind .

comment by OJFord · 2024-01-28 · in Anki – Powerful, intelligent flash cards

I recommend the new algorithm of Anki: https://github.com/open-spaced-repetition/fsrs4anki

comment by jarrett-ye · 2024-01-27 · in Show HN: Anki/Duolingo-like app using educational YouTube videos

It would be nice if you could report this on Github. You can do it here: https://github.com/open-spaced-repetition/fsrs4anki/issues/n...

comment by AngaraliTurk · 2024-01-17 · in FSRS: A modern, efficient spaced repetition algorithm

FSRS has considered the spacing effect in its model: https://github.com/open-spaced-repetition/fsrs4anki/wiki/The...

comment by jarrett-ye · 2024-01-16 · in FSRS: A modern, efficient spaced repetition algorithm

…a card after the due date. [0] https://dl.acm.org/doi/10.1145/3534678.3539081?cid=996605471... [1] https://github.com/open-spaced-repetition/fsrs4anki/wiki/The...

comment by siraben · 2024-01-15 · in FSRS: A modern, efficient spaced repetition algorithm

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FSRS: A modern, efficient spaced repetition algorithm

story by rickcarlino · 2024-01-15 · 126 comments

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FSRS4Anki: A modern spaced-repetition scheduler for Anki

story by iscream26 · 2024-01-04 · 1 comment

…if you want to see some rigorous analysis of large-scale real-world spaced repetition science. [0] https://github.com/open-spaced-repetition/fsrs4anki [1] https://dl.acm.org/doi/10.1145/3534678.3539081?cid=996605471... [1]…

comment by siraben · 2023-11-03 · in Anki 23.10 Released

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The FSRS (Free Spaced Repetition Scheduler) Algorithm

story by Tomte · 2023-10-20 · 0 comments

…If you are serious about anki and start developing a big library I would recommend as well using: https://github.com/open-spaced-repetition/fsrs4anki/tree/mai... It's a scheduler that's pretty well thought out, and can spread your reviews…

comment by ramblerman · 2023-07-13 · in Ask HN: What one skill are you proud of developing on your own?

…I feel, with ostensibly state of the art SRS algorithms being published with Anki implementations ( https://github.com/open-spaced-repetition/fsrs4anki ) out of the box. Though as someone that's solely used Anki for language learning, I do…

comment by igloopan · 2023-03-18 · in Anki-fy your life

I've noticed this https://github.com/open-spaced-repetition/fsrs4anki set of modifications for the Anki algorithm is popular in the Anki Discord. Might be of interest to those exploring the code.

comment by Kelamir · 2022-12-27 · in Anki SRS Algorithm : Spaced repetition explained with code