FSRS - Anki Forums

Topic	Replies	Views	Activity
Open Spaced Repetition / FSRS4Anki Wiki Welcome to the FSRS4Anki Wiki! :books: A brief overview of FSRS: ABC of FSRS :blue_book: Tutorial: Anki version 23.10+ or ≤2.1.66 :question: Frequently asked questions about FSRS: FAQ :abacus: The formulas of memory…	2	1626	May 16, 2024
About the FSRS category	0	334	February 1, 2024
FSRS very uneven difficulty	8	212	December 5, 2025
Health check bad fit recommendations wrongly assume cards are too hard, not too easy	0	31	December 3, 2025
Simulator predicts a huge increase in workload – is this reversable?	7	160	November 16, 2025
Help! I messed up my decks with optimization	4	107	November 29, 2025
I'm forgetting cards which have long intervals	3	115	November 27, 2025
Request: Option for deck specific DR to apply subdecks	4	62	November 27, 2025
FSRS gives very long initial intervals after long period without new cards	2	73	November 26, 2025
FSRS Intervals are so high	3	146	November 25, 2025
FSRS simulator underestimates the number of cards memorized	4	74	November 24, 2025
Never reviewed unsuspended cards starting with different intervals	2	27	November 22, 2025
I changed the way I grade my cards. Should I defer optimization to give FSRS more data first?	7	164	November 21, 2025
If you would like automatic optimization of FSRS parameters, please submit a response	10	244	November 16, 2025
Has anyone done a live comparison of FSRS and SM2 as implemented in Anki? (It looks like no, so can anyone help me set it up?)	12	6454	October 17, 2025
Flag wise retention similar to deck wise retention	10	105	November 12, 2025
"Smooth graph" doesn't do anything	6	67	November 5, 2025
Inconsistent Anki affecting FSRS parameters	1	43	October 1, 2025
FSRS>=5 is a significant regression for a minority of users who use again a lot on new and learn cards	64	746	October 28, 2025
Will Older Decks always tend to have larger difficulty levels?	18	155	October 24, 2025
Should FSRS penalize harder cards like SM-2 does?	2	70	October 24, 2025
"Due" review count high despite not learning new words	15	218	October 22, 2025
FSRS retention simulator cuts off at 70%	1	79	October 21, 2025
Review intervals too short for high difficulty	10	296	October 21, 2025
Feature request: FSRS should take reverse cards into account when scheduling	8	140	October 15, 2025
Parallelized optimization	4	53	October 15, 2025
Add non-linear grade-delta-difficulty	13	209	October 12, 2025
Aren't parameters cheap?	4	174	October 7, 2025
Does Set Due Date... contradict FSRS?	7	173	October 5, 2025
True Retention is a lot lower than Desired Retention	6	348	October 5, 2025

Open Spaced Repetition / FSRS4Anki Wiki

Welcome to the FSRS4Anki Wiki! :books: A brief overview of FSRS: ABC of FSRS :blue_book: Tutorial: Anki version 23.10+ or ≤2.1.66 :question: Frequently asked questions about FSRS: FAQ :abacus: The formulas of memory…