AnkiWeb addon 1779617428
Rewrites card due dates via shifting, stretching, or daily caps, with filtered deck/tag selection, simulation previews, timeline charts, and single-step undo.
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| Min Anki | Max Anki | Updated |
|---|---|---|
| 24.06 | 25.02.1+ | 2026-09-16 |
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Advances only FSRS-safe cards from selected upcoming days into a filtered deck, previewing daily load and allowing optional beyond-safe selection, while unreviewed cards keep original due dates.
Pauses individual decks—including sub-decks—by shifting review and learning card due dates while leaving new cards untouched, adding an orange badge, preventing parent/child conflicts, and providing a management dialog.
Acts as the local Anki-side helper for a browser extension, finding and unsuspending cards and building filtered Incorrects and Marked review decks while keeping all data local.
Calculates a daily study plan per deck to finish reviews and new cards by a target date, with adjustable intensity, deck selection, simulations, and automatic unique presets.
Creates filtered decks from browser tags via right-click or Alt-click, with customizable names, card counts, search suffixes, and sort orders.
Gathers due review cards from chosen decks into one daily-rebuilt filtered deck with configurable order and card limit, preserving normal scheduling.
Anki Time Warp is a review timeline manipulation tool designed for serious Anki users who need greater control over their study schedules. This add-on enables simulation and rewriting of card due dates with full preview capabilities. It was created to help learners:
By visualizing and reshaping your review timeline, Anki Time Warp empowers you to take control of your spaced repetition workflow without compromising long-term retention.
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Shift all scheduled reviews forward or backward by up to 365 days. Every card keeps its position relative to the others, so a deck you paused for months comes back exactly as it was. Cards that are months overdue are picked up as well.
Positive values flatten the next 90 days toward an even daily load; negative values compress the schedule toward today. Works on the whole load at once, so the result is smooth rather than sawtoothed.
Put a ceiling on any single day; overflow spills forward instead of being dropped.
Preview transformed review schedules over a 90-day horizon before committing any changes.
Select specific decks or filter by tags to isolate exactly the cards you want to manipulate.
Changes are written as one undo entry (Edit → Undo Time Warp). Only due dates change; intervals, ease and review history stay as they are.
Interactive timeline visualizes the effect of stretching/shifting so you can fine-tune parameters before committing.
Anki’s built-in scheduler excels at optimizing long-term memory retention, but it lacks tools for flexible timeline planning. Whether you're preparing for medical boards, semester finals, or language proficiency exams, there are times when you need to bend the schedule to your needs.
This add-on was created to:
The full source code and development repository can be found on GitHub.
MIT License – free for personal and academic use.
deep_intervention@posteo.de
Reshape your Anki review schedule — see exactly what changes before it happens.
Same snow, better spread.
Anki's scheduler optimises for retention, not for your calendar. Time Warp lets you reshape the review load itself: spread a pile-up over more days, push everything past a holiday, or cap how many cards a single day is allowed to hold — with a live chart of the result before anything touches your collection.
Every transformation is card-preserving: no card is ever dropped or duplicated, only moved.
Move the whole schedule by up to ±365 days. Every card keeps its position relative to the others, so a deck you paused for five months comes back exactly as it was, just five months later. This is the difference to Anki's built-in Set Due Date, which scatters cards randomly and destroys their order.
Cards that are months overdue are picked up as well — the past horizon grows to fit the oldest card in scope.
The Stretch slider works on the whole review load at once rather than scaling each card's interval individually, so the result is smooth instead of the sawtooth pattern per-card scaling produces.
Max cards/day puts a ceiling on any single day; the overflow spills forward into the following days rather than being discarded.
-1 — off, the stretch slider controls the distribution0 — auto, levels to the average over the horizon>0 — a manual ceilingCollapse overdues to T0 takes everything that is already overdue and folds it into today instead of leaving it stranded in the past.
Pick a single deck or all of them, then narrow further by tags. Suspended cards are always excluded. Counters show how many cards are in scope and how many of them are actually in review.
The chart shows the whole simulated timeline — red bars for overdue, blue for scheduled, plus a dashed line when a daily cap is active. The preview updates as you drag, and nothing is written until you press Apply Changes. Apply always re-simulates from the current settings, so what you confirm is what gets written.
Due dates are rewritten in place in a single undo entry (Edit → Undo Time Warp). Only the due date changes; intervals, ease and review history stay as they are.
From AnkiWeb — search the add-on catalogue for Anki Time Warp.
Manually
anki_time_warp inside your Anki addons21
directoryThe add-on appears under Tools → Anki Time Warp.
Chart.js ships with the add-on and is inlined at runtime — Time Warp makes no network requests.
Changes are written inside a single custom undo entry, so Edit → Undo Time Warp reverts the whole operation. As with any add-on that edits scheduling data, take a backup before a large transformation, and note that an undo is only available until you sync.
Suspended and buried cards, cards in filtered decks, new cards and cards in intraday learning are never touched.
A note on schedulers: with FSRS, moving a due date has no effect on the next interval (FSRS measures elapsed time from the last actual review). With the SM-2 scheduler, Anki grants an "overdue bonus" based on how late a card is answered; shifting a card later forfeits that bonus (conservative), pulling it earlier makes the next interval slightly larger than the elapsed time would justify. Use positive stretch with that in mind if you are not on FSRS.
There is a standalone test suite (python3 tests/test_core.py) that checks card
conservation across a grid of stretch / shift / cap combinations.
MIT — free for personal and academic use.
deep_intervention@posteo.de