Credits are the unit in which tutoring is metered. They cover the tutor's responses, the voice narration and the visuals generated for each lesson. Usage is converted from the actual cost of the AI model, audio and visuals used, so a short, simple lesson costs less than a long, diagram-heavy one.
- The Starter plan includes 500 credits every month. Monthly credits expire at renewal.
- Credits bought as a one-off top-up do not expire while your account is active.
- Replaying a saved lesson does not use credits. Neither does browsing your history or Study Spaces.
- Every grant, purchase and lesson debit is listed under Credit activity on the Credits page, with the lesson it relates to.
More in Credits & billing
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