Anki Simulator is an add-on for Anki that lets you simulate Anki progress over time using your cards, deck options and statistics. You can use it to estimate your future workload or to fine-tune and compare deck options.
Why is this awesome?
It’s personalized: it loads your actual cards, deck settings and retention rates automatically. It’s fast and easy to use: everything is pre-loaded. Just press simulate! You can compare the effect of different settings on your workload in a fancy chart Anki simulator is the answer to all the “Are these the right settings for me?” questions
How accurate is it? Anki Simulator was carefully written to closely match Anki’s scheduling algorithm. Because the add-on uses your actual cards, deck options and statistics, Anki Simulator is able to produce a personalized simulation. If you provide accurate variables, the simulator should do a good job of giving you a rough idea of your future workload. Obviously however, long-term outcomes rely on many factors that can’t be implemented in an add-on. The add-on takes some assumptions that may not be applicable in your situation: It does not take into account pressing the ‘hard’ or ‘easy’ buttons. The simulator assumes that excluding them both should balance their effects out for a large part. (Also see: ‘Performance rates’ in the add-on manual) It assumes that your retention rates are correct and will not change in the future, and are the same for every single card of a certain type (learning, lapse, young, mature), regardless of individual difficulty. It assumes that no days are skipped.
How to start it? Easily open up the Simulator window by clicking the gear button: For more instructions, there is a built-in manual. Contributing The source code is available on Github! Feel free to help improve Anki Simulator! We’re excited to hear your feedback and see your simulations! Latest changes
2023-11-06 - v1.1.3: Added clear all button for Amabuzi. Fixed error in retention rates calculation for learning steps below one minute by GiovanniHenriksen and also resolved Qt6 compatibility issue reported by abdnh. 2021-08-07 - v1.1.2: Fixes crash for Anki versions above 2.1.45. Thanks to RumovZ for contributing to fix this and thanks to AnKingMed for reporting the crash on Github. 2021-02-21 - v1.1.1: Graph now also shows the day number. Includes a few minor bug fixes 2021-01-30 - v1.1: Added more stats to the graph, including percentage mature 2020-07-21 - v1.0.2: Compatibility fix for Anki 2.1.28 and alternate Anki builds 2020-05-25 - v1.0.1: Bug fixes and minor changes
License and credits © 2020 GiovanniHenriksen & Aristotelis P. (Glutanimate)
Anki Simulator is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details. For more information please see the LICENSE file that accompanied this program.
Anki Simulator ships with Chart.js, (c) 2019 Chart.js Contributors (available under the MIT license)
Authors Anki Simulator was created as a joint effort between GiovanniHenriksen and Glutanimate.
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Reviews (28)
👍 2026-02-15
Not working (is it also supposed to work for FSRS?)
👍 2025-04-30
on 2025-04-26 Perfect, thanks!
👍 2025-02-25
It’s absolutely awesome!
👍 2025-01-03
Great addon, but w/out FSRS support unfortunately.
👍 2024-11-28
I’ve kind of been looking for something like this. Thanks a lot, man!
👍 2024-11-08
It’s a great plugin.
It allows me to predict when I can reach a stable state if I learn X new cards every day.
👍 2024-10-23
Good idea in theory and I can tell a lot of work was put into this, but the simulation is super off. Perhaps it is because I am using FSRS, but the number of cards expected never match up to what I actually get. At least the next day should match anki’s own default predictions in the stats menu right? Weirdly enough it is significantly higher by maybe 50% or more. Please implement FSRS support and this will work great!
👍 2024-06-20
An awesome tool for getting a handle on your workload, planning, etc. So glad you made this!
👍 2024-04-19
Does not take into account “New cards per day”: setting it to 1 or 1000 changes nothing in the simulation. The addon is great otherwise
👍 2024-03-09
Good addon, no issues and does exactly what it says it does
👍 2024-02-29
Excellent add on - would it be possible to add a feature similar to Anki simulator where we could see our estimated total reviews in the future?
👍 2024-01-27
I love this add-on!
👍 2024-01-19
Great addon! Very useful to see how it will affect my cards in the future. I would love to see this implemented with FSRS ! It will be less predictable than with the old algorithm of course but at least to get a rough idea of reviews based off of our previous review habits would be really nice.
👍 2023-12-28
Really great tool to help plan out reviews, especially for decks I’ll be using for a while. However, would appreciate FSRS compatibility when possible. Thank you!
👍 2023-10-18
Hi, it would be very useful if there was a button to perform simulations switching between SM-2 and FSRS4Anki.
👍 2023-09-22
This works super easily and is motivating for your big decks.
👍 2023-09-03
Super helpful!
👍 2023-08-26
thanks!
👍 2023-08-06
Mine on the left says “number of repetitions” instead of “number of cards” per day on the graph. Also, no matter what settings, or number of reviews each day, or whatever else I change in the simulator it still gives me the same performance for the deck and same forecast (number of repetitions) every time. Unless I’m doing something wrong, the simulator says no matter if I do 50 new cards a day or anywhere up to 500 new cards, I will never finish my deck and always plateau at around 400 “number
👍 2023-07-11
Got it installed, and did some simulations. It’s a bit like periodized training in sports, you need an event date, otherwise, any simulation forecast is just that, without a day of reckoning.
👍 2023-05-31
Like this a loooot actually
👍 2023-03-23
works like a charm.
👍 2023-03-11
Love it! It Helps me decide on my ideal new cards per day for a deck
👍 2023-02-14
allows for nice predictions of future review based on current performance
👍 2023-02-13
excellent addon
👍 2023-02-01
Very helpful
👍 2023-01-04
Great add-on! Really appreciate the ability it gives to forecast what the workload will look like in coming months and when you’re likely to get a deck to a steady state. A few things would be very helpful:
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Export data
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Show stacked area chart instead of overlapping line graphs. (unfortunately, I don’t think there’s a way to do this with super-decks because they assume only one deck’s success rate instead of factoring the success rates of each individual deck - but I could be wrong here)
👍 2022-12-13
Amazing add-on!
