Privacy Notice

No accounts, no profile

EngiCore does not require an account. We do not ask for your name, address, or phone number, and we do not build advertising profiles about you.

How the three free tool uses are counted

To give every visitor three free executions without letting the counter be reset by refreshing the page or clearing browser storage, the tool counts uses on our server and attaches them to your network address (IP address). Your IP address is never stored as-is: it is immediately converted into a one-way cryptographic hash (HMAC-SHA256) and only that hash, the number of uses, and the time of the last use are saved. The hash cannot be reversed back into your IP address. We keep it only to enforce the free-use limit and to keep the counter stable.

One IP address is not one person. If you share a network (home, office, school, public Wi-Fi) or use a VPN, the three free uses may be shared with others on that same address or may differ when your address changes. If you believe you were limited unfairly, contact us and we will help.

Donations and PRO access

Donations are processed by Gumroad, which handles your payment details — we never see or store your card information. After a donation, Gumroad notifies us of the verified sale so we can unlock PRO. We store the Gumroad sale id, the amount, the currency, the date, and a one-way hash of the email you used at checkout. We do not store the email itself.

PRO access is remembered on your device with a signed access token kept in your browser storage. Because the token is signed by our server, it cannot be edited or forged. You can recover PRO at any time on another browser or device by entering the email from your Gumroad receipt.

Your tool input

The project type, objective, and complexity you type are sent to our AI provider to generate your plan. They are not used to identify you and are not stored in our database.

Service providers

We rely on a small number of providers to run EngiCore: our hosting and database provider, the AI model that generates your engineering output, and Gumroad for donations. Each processes only what it needs to deliver that part of the service.

Your choices

You can clear the PRO token from your browser storage at any time; PRO is then restored with the email recovery flow if you have donated. To ask what is held against your hashed network address, or to have it removed, contact us.