A modern Anki custom scheduling based on Free Spaced Repetition Scheduler algorithm

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ts-fsrs is a versatile package written in TypeScript that supports ES modules, CommonJS, and UMD.

Python Package for FSRS Spaced Repetition

FSRS for Rust, including Optimizer and Scheduler

An Anki add-on that supports Postpone & Advance & Load Balance & Easy Days & Disperse Siblings & Flatten

A benchmark for spaced repetition schedulers/algorithms

Go Module for FSRS

FSRS Optimizer Package

Interval Repeat Flashcard Demo with Basic Simple Features Designed based on Next.js App Router, ts-fsrs, Hono.js and kysely.

Dart Package for FSRS

FSRS for the browser, including Optimizer and Scheduler

A simple comparison between FSRS and SM-17

Common/Emacs Lisp implementation for FSRS

Beautiful local-first flashcards.

Anki FSRS Visualizer

Python bindings for fsrs-rs, use burn-rs, instead of pytorch. 2GB -> 6MB, save your disk!

A Swift implementation of the FSRS spaced repetition algorithm

Sprout is a full-featured flashcard app built entirely in Obsidian. Designed to minimise friction and keep card creation simple, it lets you spend less time managing flashcards and more time studying. It offers a range of rich card types, FSRS algorithm scheduling, Anki import/export, and study analytics.

The FSRS algorithm in 100 lines of Rust.