Package: rfsrs 0.3.2

rfsrs: R Bindings for FSRS Spaced Repetition Algorithm

R bindings for the fsrs-rs Rust library implementing the Free Spaced Repetition Scheduler (FSRS) algorithm. FSRS is a modern spaced repetition algorithm based on the DSR (Difficulty, Stability, Retrievability) model of memory. Includes parameter optimization to train custom parameters from your review history, achieving better scheduling accuracy than default parameters or traditional algorithms like SM-2.

Authors:Christos Longros [aut, cre]

rfsrs_0.3.2.tar.gz

rfsrs_0.3.2.tgz(r-4.6-x86_64)rfsrs_0.3.2.tgz(r-4.6-arm64)rfsrs_0.3.2.tgz(r-4.5-x86_64)rfsrs_0.3.2.tgz(r-4.5-arm64)
rfsrs_0.3.2.tar.gz(r-4.7-arm64)rfsrs_0.3.2.tar.gz(r-4.7-x86_64)rfsrs_0.3.2.tar.gz(r-4.6-arm64)rfsrs_0.3.2.tar.gz(r-4.6-x86_64)
manual.pdf |manual.html
card.svg |card.png
rfsrs/json (API)
NEWS

# Install 'rfsrs' in R:
install.packages('rfsrs', repos = c('https://chrislongros.r-universe.dev', 'https://cloud.r-project.org'))

Bug tracker:https://github.com/open-spaced-repetition/r-fsrs/issues

On CRAN:

Conda:

rustcargo

4.08 score 3 stars 5 scripts 20 exports 2 dependencies

Last updated from:3e656fb1be (on master). Checks:5 OK, 2 WARNING, 2 NOTE, 4 FAIL. Indexed: yes.

TargetResultTimeFilesSyslog
linux-devel-arm64OK185
linux-devel-x86_64OK210
source / vignettesOK350
linux-release-arm64OK191
linux-release-x86_64OK209
macos-release-arm64WARNING144
macos-release-x86_64WARNING481
macos-oldrel-arm64NOTE213
macos-oldrel-x86_64NOTE417
windows-develFAIL301
windows-releaseFAIL280
windows-oldrelFAIL348
wasm-releaseFAIL159

Exports:CardCard_from_jsonfsrs_anki_to_reviewsfsrs_evaluatefsrs_intervalfsrs_memory_state_from_historyfsrs_migrate_sm2fsrs_new_card_statefsrs_next_memory_statefsrs_optimizefsrs_parametersfsrs_recall_probabilityfsrs_recall_probability_vecfsrs_simulatefsrs_versionRatingReviewLogSchedulerScheduler_from_jsonState

Dependencies:jsonliteR6

Getting Started with rfsrs

Rendered fromgetting-started.Rmdusingknitr::rmarkdownon Jun 19 2026.

Last update: 2026-03-25
Started: 2026-01-17