C15-OBD ("the app") is a vehicle diagnostics app. This policy explains what happens to your information when you use it — both inside the app and in the services that run it for us.

• Account details — the name and email address you give us when you register, or that your Google, Apple or Microsoft sign-in shares with us.
• The vehicles and diagnostic records you save — vehicle profiles (make, model, year, engine details and a VIN if you type one), saved scan sessions and fault codes, maintenance tasks and mileage, and any notes you add.
• Live readings — sensor data is read and shown in your browser while you are connected to a reader. We do not store live readings unless you save a session.
• Purchase information — payments are handled by Base44 Payments. We keep what is needed to give you access (purchase reference, plan, status and your email). Card details are handled by the payment provider and never reach us.
• App and device data — basic technical information such as error logs, and settings held on your own device, for example your chosen theme and the reader preferences you saved.

To run the app and keep your vehicles, scans and maintenance records available to you; to unlock the subscription features you have paid for; to answer your messages; to keep the service secure and fix faults; and to meet our legal obligations. We do not sell your personal information and we do not use your diagnostic data for advertising.

When you use AI Diagnostic, the fault codes and vehicle details you enter (make, model, year, engine and engine code) are sent to the AI service that writes the guidance and are returned to your screen. Leave names, addresses and other personal details out of the notes you add — they are not needed to work out a repair.

Only the providers that run the app for us: hosting and database, email delivery, AI processing and payments. They act on our instructions. We may also disclose information where the law requires it, or to protect the service and the people using it.

Your account, vehicles and saved records are kept while your account is open. You can delete your account at any time from Settings. If you want anything else removed, ask us through the Contact page and we will delete it unless we are required to keep it.

You can ask to see a copy of your information, correct it, delete it or receive it in a portable format, and you can object to some uses. Send the request through the Contact page and we will reply within the time the law allows. If you are in the UK or EU you also have the right to complain to your data protection regulator — in the UK, the Information Commissioner's Office.

Information is encrypted while travelling between your device and our services, and access is limited to what is needed to run the app. No service can promise perfect security, so keep your password to yourself and tell us straight away if you think someone else has got into your account.

The app keeps a few preferences in your browser or app storage — your theme, your last connection details and similar settings — so you do not have to enter them again. We do not use advertising cookies.

The app is intended for drivers and vehicle owners and is not aimed at children under 16. We do not knowingly collect their information.

If this policy changes in a way that matters, we will update the date at the top, and where the change is significant we will tell you in the app.