Funding & no-ad policy
Free access, no advertising and no optional tracking
Free to use
Involute CAD is provided free of charge. There are no subscriptions or required purchases. You may optionally support Tyrone Charlton through PayPal.Me/involutecad. Tips support development; they do not buy features, priority, goods or services. They are not presented as charitable donations or tax-deductible contributions. The site has no advertising, sponsorship or affiliate revenue.
Optional tips and downloads
STL and OBJ downloads start after a fixed 10-second countdown. Tipping is completely optional and does not shorten the countdown. PayPal opens separately, where you choose an amount and confirm payment. The editor does not collect card details or check payment status. PayPal eligibility rules, terms and any applicable fees apply.
For a mistaken tip or refund enquiry, email involutecad@gmail.com with the transaction reference, not your card details. Requests are reviewed individually; nothing here limits mandatory legal rights or PayPal dispute rights.
No advertising or tracking
We do not display ads or sponsored placements, include affiliate links, or load advertising networks. The application does not use cookies, analytics, tracking pixels, persistent visitor identifiers or behavioural profiling. Gear projects are processed locally in your browser.
Hosting is separate
The public site uses OpenAI Sites hosting. Its delivery and security processing is described in the privacy notice; the enabled features still need verification on the hosted site. A host's cookie is not automatically exempt from privacy or consent requirements just because it comes from the host. See Cookies & privacy choices.
Contact and changes
Contact involutecad@gmail.com with questions. Advertising and optional tracking are not planned for this release. Any future change would require a review of the service, clear updated notices and any legally required controls before activation; using this version does not give consent to future tracking.