AnkiWeb addon 9512376
Reduces next interval growth for very mature cards to slightly improve retention, though it is unmaintained and incompatible with recent Anki versions.
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abandoned
| Min Anki | Max Anki | Updated |
|---|---|---|
| 2.1.0 | – | 2020-08-08 |
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Reschedules Anki cards using FSRS review histories, postpones or advances selected cards, balances daily workload, schedules breaks, disperses sibling cards, flattens backlogs, and reports memory and learning-step statistics.
Displays a stacked bar graph of card states over time, color-coded by interval, with an FSRS-based estimated total knowledge retention line and main-screen integration.
Generates an HTML dashboard summarizing daily, weekly, or monthly study sessions with retention, FSRS metrics, SVG growth graphs, narrative insights, and optional LLM-generated reflections from local collection data.
Sets each deck options group’s initial ease factor to the average ease of its mature cards, recalculating automatically whenever a profile loads.
Creates filtered decks of optimal cards for studying ahead, choosing those whose intervals would be reduced by the smallest percentage.
Provides a detailed analytics dashboard for Anki review history, including heatmaps, retention, consistency, efficiency scores, trends, session and lapse analysis, and time-range filters.
not maintained. this doesn't work with recent anki versions. You can now implement the feature this add-on provides in anki itself using the "custom scheduling" box in the advanced section of your deck settings - that's probably 10-30 lines of javascript code.
Use this at your own risk. If this add-on has a bug all future scheduling might be ruined. I use it for me. Hardly anyone else uses it. Maybe it's useful for you, too. Before you use it you could have a look at the source code which is only about 20 lines.
If you have set a maximum interval in your deck settings this add-on will sometimes give you strange intervals, for details see here!
Feedback, Improvements, Error reports are welcome - open an issue in my github repo.
# My motivation I hate forgetting/rescheduling cards with very long intervals. It feels like I wasted reviews (even if I don't use a lapse interval of 0%). This add-on reduces the next interval for very mature cards which should slightly increase their retention rate. Lowering the intervals overall (with a reduced interval modifier) is not an option because this would lead to a lot of additional work, check the calculations in the manual here. Having an add-on that slighly lowers the interval for very mature cards is soothing.
I'm not sure if such a reduction is really useful apart from this psychological effect: Unless you limit your Anki use to languages you have the problem that most of the knowledge you learn now won't be relevant for you in the long run: Either it will be dated or your needs have changed. So forgetting very mature cards shouldn't be a problem in many cases.
Maybe the additional workload could be justified like this: If each review lasts 10 seconds and ...
# Implementation
This add-on overwrites one method from the scheduler(_nextRevIvl).
To compare the built-in scheduler with my modifications I use my add-on deck and card info sidebar during review and in it enable the option "try_to_show_origvmod_scheduler”. Keep in mind that after Anki calculates and shows the new intervals for easy/good/hard it applies some randomness (fuzz). So if you look into the info of the prior card you should always see a slightly different number.