Privacy

Calculations run in your browser. Your design inputs are not sent to our server unless you choose to attach them to a design-review request.

Analytics

We count anonymous events such as "calculation run", the diaphragm shape (square or circular) and a coarse pressure range. We do not set cookies, store IP addresses or build user profiles. Rate limiting uses a salted hash of the IP address that expires within an hour.

Forms

If you request a design review or join the Pro waitlist, we store your email, role and message to reply to you. We do not sell or share it. Ask us to delete it at any time by replying to any email from us.

Payments

Payments are handled by Lemon Squeezy as merchant of record. We receive your name, email and order details, never card data.

Local storage

Your last inputs, saved projects and Pro license key are kept in your own browser's local storage.