Privacy notice
How your information is handled
Who is responsible?
Involute CAD is the product name. You can contact the service at involutecad@gmail.com. The public site uses OpenAI Sites hosting. The operator and data controller for this service is Tyrone Charlton. See Contact & operator details.
Your gear projects
Gear, shaft, bearing and housing settings, calculations, simulations and file generation run in your browser. Opening a JSON file reads it locally; this application does not upload it. Save and Export download files to your device. Unsaved project state is held in the open page, not saved by the application to cookies or browser storage, and is normally lost when you reload or close the page.
You control downloaded files and any copies you share. Your browser or device may retain downloads, cached pages or restored tabs under its own settings. Avoid putting personal or confidential information in project names if you plan to share the files.
Other information
This version has no accounts, contact form, mailing list, application analytics, advertising tags or tracking pixels. Optional tips are processed on PayPal, outside this application. Its own code does not sell personal information or share it for targeted advertising. It does not make automated decisions with legal or similarly significant effects about you.
If you use a browser assistant, the browser may make your current gear project available to that assistant through the page’s read-only tool. The tool does not send your project automatically. Your browser or assistant provider’s privacy terms apply to its own processing.
Optional PayPal tips
The tip link opens PayPal in a new tab. No PayPal script, payment form or tracking pixel is embedded in Involute CAD. PayPal handles checkout and payment details under its privacy statement, including its own cookies, retention and international processing.
When you tip, the operator may receive your name, email address, amount and transaction reference through PayPal and payment notifications. These records are used to administer tips, handle refund enquiries and disputes, and meet accounting or legal duties. Processing relies on legitimate interests in administering voluntary support and, where applicable, legal obligations. Records are retained only as needed for these purposes and applicable statutory periods, with disputes reviewed after resolution. They are not added to a marketing list. The editor does not receive your card details or payment status.
Email enquiries and complaints
If you email involutecad@gmail.com, the service receives your address, message and any attachments you send. These are used to respond to your enquiry, provide support, investigate complaints and protect the service. The basis for ordinary correspondence is legitimate interests in running and supporting the service, subject to balancing your rights. Handling legally required privacy requests also relies on compliance with legal obligations.
The mailbox is provided through Google’s Gmail service. Google processes email under the terms that apply to the account; see Google’s privacy policy. No specific business data-processing agreement or transfer mechanism is claimed to have been verified for this account.
The retention policy is to keep routine enquiries while resolving them, then delete them within 12 months of closure. Complaint and rights-request records are reviewed after resolution and kept only as long as needed to demonstrate the response or meet a legal requirement. Any longer retention for a dispute or legal obligation must have a documented reason. This is an operating policy for the mailbox owner, not automatic deletion performed by the website.
Please send only information needed for your enquiry. Do not send passwords, identity documents or confidential CAD files unless needed and specifically requested.
OpenAI Sites hosting
The public website is hosted through OpenAI Sites. Your browser connects to the hosting infrastructure to load pages and assets. This application does not upload your gear projects or install visitor analytics.
OpenAI's privacy policy describes processing such as IP addresses, browser and device information, request times and service usage, including delivery and security purposes. These are platform practices, not a confirmed inventory of every field collected on this particular site. See OpenAI's UK/European privacy policy or its privacy policy for other regions.
Hosting retention and international transfers
No site-specific hosting-log retention period or operator access to visitor logs has been verified. We do not promise that the host keeps no logs. OpenAI's policies describe retention according to the purpose, security and legal requirements. Sites does not currently provide data residency at launch, so UK-only processing is not promised; see the Sites documentation. Platform transfer arrangements and privacy requests are covered by OpenAI's applicable policies. Gmail separately handles support correspondence as described above.
Your privacy rights
Where applicable, you may request access, correction, deletion, restriction or portability of personal data, object to certain processing, and withdraw consent for consent-based processing. Rights depend on the circumstances and are not absolute. Withdrawal does not change the lawfulness of earlier processing. Email involutecad@gmail.com with your request. We will respond within the applicable legal time limit, normally one month for UK data rights requests, and explain any lawful extension or necessary verification.
You can complain to the UK Information Commissioner’s Office or your relevant local regulator. Read the ICO’s explanation of individual rights.
Cookies and international visitors
See Cookies & privacy choices for this build’s storage and tracking status, and International privacy information for regional considerations. The current service is free and has no advertising or optional tracking. See the funding and no-ad policy.
Children and changes
No behavioural advertising is installed. The application has no age restriction and is a general-purpose design tool, not a service targeted at children. Hosting-platform terms also apply. No age-verification data is collected. Children should avoid including personal details in project files and ask a trusted adult for help with physical making or sending a support message. This notice will be reviewed when the service or its data handling changes.
Reference: ICO: information a privacy notice must provide.