Standard Book vs Pro Book one-off purchases

What a one-off purchase changes

A one-off book purchase attaches an entitlement to one existing project. It does not upgrade the user's account tier and does not create a recurring subscription.

Checkout happens after the project exists, so the payment can be tied to the exact project being unlocked.

Standard Book

Standard Book unlocks Starter-level project features for a 10-chapter book. It is intended for a complete standard-quality book without a recurring subscription.

Pro Book

Pro Book unlocks Pro-quality generation features for a 10-chapter project, including the multi-pass writing pipeline, coherence review, style refinement, fact-checking, and the configured Pro image allowance.

Why recurring Pro is still different

Recurring Pro remains an account-level plan with recurring credits, multiple projects, and its higher chapter allowance per ebook. Buying Pro Book on one project does not grant those account-wide benefits.

The effective-tier rule

Standard Book maps that project to the Starter feature set; Pro Book maps it to the Pro feature set. The backend then compares that mapped tier with the account subscription and uses whichever is higher for the project.

There is one deliberate exception to simply inheriting the recurring Pro limits: Pro Book remains capped at the standard 10-chapter one-off scope, while recurring Pro keeps its higher per-ebook chapter limit.

Paid one-off output is treated as paid output

A paid one-off project, like a paid subscription project, exports without the Free-tier Scribora attribution. The entitlement is still attached only to that project; this does not change the account plan shown elsewhere in the product.