free-spaced-repetition-scheduler
Pentive
free-spaced-repetition-scheduler | Pentive | |
---|---|---|
11 | 11 | |
260 | 32 | |
5.8% | - | |
5.3 | 9.7 | |
23 days ago | 5 days ago | |
Python | TypeScript | |
MIT License | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
free-spaced-repetition-scheduler
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Anki – Powerful, intelligent flash cards
... 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.
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FSRS: A modern, efficient spaced repetition algorithm
Libraries: https://github.com/open-spaced-repetition/free-spaced-repeti...
All are MIT licensed I believe, Anki is primarily AGPL
- The FSRS (Free Spaced Repetition Scheduler) Algorithm
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FSRS explained, part 1: What it is and how it works
Just read the wiki ¯\_(ツ)_/¯
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FSRS is supported in AnkiMobile now!
The model used by FSRS: https://github.com/open-spaced-repetition/fsrs4anki/wiki/Free-Spaced-Repetition-Scheduler
- How to use the next-generation spaced repetition algorithm FSRS on Anki?
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How did I publish a paper in ACMKDD as an undergraduate? A fantastic research experience on spaced repetition algorithm. Open source the code and dataset.
Also, sorry for nitpicking, but I just checked the code here, and I saw that you changed the formula for post-lapse stability, but you didn't update the formula in the description here.
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New progress in implementing the custom algorithm.
I have another one, also about difficulty. Look at the long "Stability updating formula after successful review" formula, there is a term D-b. This seems very counter-intuitive. A large value of D corresponds to an easy card, but thanks to that formula it will produce a very small change in stability. A small value of D corresponds to a difficult card, but according to that formula it will change stability a lot.
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Implement a new spaced repetition algorithm based on anki custom scheduling.
So I checked this and it seems that there's a whole bunch of different parameters (initial difficulty, initial stability, etc), and a lot of them are constant. So the next step would be to use some kind of optimization algorithm, like gradient descent, to optimize those parameters based on user's review history, right?
Pentive
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Anki – Powerful, intelligent flash cards
> I wonder what the ecosystem would look like if things were otherwise.
Shameless plug - I'm building https://github.com/AlexErrant/Pentive which is basically GitHub/Reddit for flashcards. Very much pre-product and a WIP, though the offline client proof of concept is done.
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Lessons from building GitHub code search [video]
I also enjoyed the Treesitter talk from 5 years ago by Max Brunsfeld https://www.youtube.com/watch?v=Jes3bD6P0To
I'm currently building a query language whose grammar is very much inspired by Github's search syntax. I'm using Lezer, which is a GLR like Treesitter, so this talk learned me some parser generators (I've no formal CS education). Here's my grammar, a playground, and an example search query if anyone wants to play with it
https://github.com/AlexErrant/Pentive/blob/main/app/src/quer...
https://littletools.app/lezer
-(a) spider-man -a b -c -"(quote\\"d) str" OR "l o l" OR a b c ((a "c") b) tag:what -deck:"x y"
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Using spaced repetition systems to see through a piece of mathematics
Not really. There are options for sharing cards on Anki https://www.reddit.com/r/Anki/comments/14j2jfy/deck_sharing_... but their collaboration features are limited.
I myself am building an Anki clone https://github.com/AlexErrant/Pentive with collaboration built in as a first class citizen, though its far from primetime. Currently stewing on how to get the SR algorithm, FSRS, to compile to wasm.
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Ask HN: Show me your half baked project
https://github.com/AlexErrant/Pentive
A free, open source, local-first, spaced repetition system that works offline, has p2p syncing, plugins, and first class support for collaboration. It's GitHub/Reddit for flashcards.
I basically took Anki and turned it into a webapp >_>
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Things you forgot because of React
I find Solid's model pretty damn close to "compiling down to nothing". I chose Solid for my project because I wanted to support plugins that used other UI frameworks. I recently got a Svelte plugin working with the SolidJS router. I could probably make it prettier... but it's literally a call to Solid's `createComponent` with the Router and an anchoring div to which the Svelte component is mounted. Ezpz.
https://github.com/AlexErrant/Pentive/blob/main/example-plug...
- Mycelite: SQLite extension to synchronize changes across SQLite instances
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An open source web-based flashcard studying system
I'm also building an Anki clone (sigh) that I'm calling "Github for flashcards".
>A free, open source, local-first, spaced repetition system that works offline, has p2p syncing, plugins, and first class support for collaboration.
https://github.com/AlexErrant/Pentive
Very much a WIP, completely unusable, but I recently made a video demoing the technical proof of concept.
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Anki-Fy Your Life
Anki, imo, already has an open algorithm (that the user can change via plugins), universal interfaces, and is "self-hosted". My eyes perked up at REST api, but it doesn't look like there's a centralized server that hosts shared cards, which is where my mind went.
I'm building https://github.com/AlexErrant/Pentive/ which is basically Anki + Reddit - people can optionally upload their cards for others to download, and the most popular cards rise to the top. It's FLOSS, offline-first, supports plugins and p2p syncing, and is very much a WIP. My proof of concept is almost done though, which demos the critical technologies in a secure way.
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A Gentle Introduction to CRDTs
I'm using cr-sqlite right now in my Anki clone: https://github.com/AlexErrant/Pentive
It's basically an offline-first flashcard webapp. CR-Sqlite allows for incremental syncing.
With Anki (the app from which I'm taking my inspiration), syncing is _not_ incremental - basically it just copies SQLite files around. So for example, the app could be on an iPhone with cards a card `A` reviewed, but the app on an iPad could make changes to the template on which card `A` is based, and that's enough to cause a conflict - you must take changes from only the iPad or only the iPhone. (To be clear - Anki does have some incremental syncing capabilities - I'm picking an intentionally pathological example.) CR-SQLite will mean that everything is incremental, however.
Basically makes 3 way merges a breeze (or n-way merges, really).
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Ask HN: What Are You Working on This Year?
A FLOSS, offline-first, spaced repetition system that has first class support for collaboration, curation, and plugins. It's Reddit for flashcards.
https://github.com/AlexErrant/Pentive
I've been thinking about this for a stupid amount of time... thinking that someday someone's going to improve on Anki. Finally got tired of it and said that person's me.
What are some alternatives?
fsrs4anki - A modern Anki custom scheduling based on Free Spaced Repetition Scheduler algorithm
highlight-search-results - Highlight Search Results in the Browser add-on for Anki
mycelite - Mycelite is a SQLite extension that allows you to synchronize changes from one instance of SQLite to another.
fsrs4anki-helper - An Anki add-on that reschedules all cards via FSRS4Anki scheduler
proposal-shadowrealm - ECMAScript Proposal, specs, and reference implementation for Realms
autoEaseFactor - Adjust ease factors in Anki based off of performance in order to hit a target success rate.
shellrunner - Write safe shell scripts in Python.
SSP-MMC - A Stochastic Shortest Path Algorithm for Optimizing Spaced Repetition Scheduling
vm2-process - Execute unsafe javascript code in a sandbox
tatoeba-to-anki - Creates Anki Flash cards from Tatoeba sentences, ordering them by difficulty and downloading audio
ankivalenz - Turn HTML files into Anki decks