AI FORMULA CREDITS
More formula drafts, only when you need them.
PureLink is free to use. Optional one-time credit packs extend the AI-assisted formula feature without turning the core URL, formula, or card tools into a subscription.
What the product does
A signed-in customer can describe a mathematical expression in natural language and receive an editable LaTeX draft with an immediate visual preview. The result is never published automatically, may contain mistakes, and must be reviewed by the customer before use.
One-time plans
US$5 provides 300 AI formula generations. US$10 provides 800 generations. US$20 provides 2,000 generations. These are one-time purchases, not subscriptions. Taxes may be added at checkout when required.
Delivery
After a confirmed payment, credits are delivered automatically to the PureLink account that started checkout. Customers must be signed in before purchasing. The five free daily generations are used before purchased credits, and purchased credits are not shared between accounts.
Credit lifetime and limits
Purchased credits do not expire while PureLink continues to operate the AI formula service. They are non-transferable, have no cash value, and remain subject to a daily safety limit that protects accounts and the public service from automated abuse.
Payment boundary
Creem is used only to sell AI formula credit packs and acts as the merchant of record for these purchases. Voluntary support for the open-source project is separate, does not grant credits or product benefits, and is not processed through Creem. Checkout is enabled only after payment-provider approval and integration testing.
Support
For purchase, delivery, or account questions, contact nasa3.14159@gmail.com. Include the email address used for your PureLink account and the order number, but never send a password, full card number, or Google credential.
Last updated: August 14, 2026