Terms · Effective August 27, 2026

A forecast, not a scheduling command.

This free utility estimates review counts and time. It does not modify an Anki collection and cannot guarantee retention, learning outcomes, or future review intervals.

Use the plan as a planning aid. Check it against your energy, actual review pace, and the queue shown by your spaced-repetition app.

What the forecast includes

The simulation uses the counts and assumptions you provide, protects regular due work before overdue recovery, applies one average review time, and enforces your session cap.

What it cannot know

The forecast does not model answer ratings, lapses, retention, learning steps, future FSRS or SM-2 intervals, buried or suspended cards, timezone changes, or collection configuration. Actual queues will differ.

Your responsibility

You are responsible for the accuracy of inputs and for any changes you independently make in Anki or another application. Keep your own collection backups before rescheduling cards.

Availability and warranty

The utility is provided “as is,” without warranty. We may update or discontinue it. To the maximum extent allowed by law, the authors are not liable for lost study progress, collection changes, or indirect damages arising from use.

Affiliation and license

Review Backlog Forecast is an independent utility and is not affiliated with or endorsed by Anki or the FSRS project. The application source is available under the MIT License.