Data handling notice — CDL Prep

Last updated: September 11, 2026

This notice explains, plainly and without beating around the bush, what data CDL Prep touches, what leaves the device, who receives it and how it stops. It complements the Privacy Policy and the Terms of Use; if anything seems to contradict among the three, follow what the Privacy Policy says.

1. First thing: what does NOT leave your device

Your progress, your answers and your settings are stored on the device itself. There is no account and we do not send your results anywhere.

2. What does leave, and why

Advertising (Google AdMob)

CDL Prep is free and is sustained by advertising from Google. To show an ad, the device communicates with Google’s servers and provides them with:

• the device’s advertising identifier (on Android the Advertising ID; on iOS the IDFA, and only if you authorize it);
• technical data: model, operating system, language, screen size and IP address, from which the country or region is inferred, not your home address;
• the fact that an ad was shown, and whether it was tapped.

We do not send Google the content you create or store in the app.

Google acts here as an independent controller. Its policies: how Google uses partner data and its privacy policy.

Manual downloads

The app downloads the official manuals for each state from their public sources. That request reveals your IP address to the server that serves the manual, as with any download. We do not accompany that request with any of your data.

Error reports

If you choose to send us an error report from the app, that submission includes what is needed to reproduce the issue: app version, device model and system version, and the message you write. It is sent only when you request it.

3. The controls you have, and where they are

3.1 Advertising consent in Europe and the United Kingdom

If you are in the European Economic Area, Switzerland or the United Kingdom, the first time you open the app a consent window managed with Google’s User Messaging Platform (UMP) appears, where you can accept or reject personalized advertising.

You can change your mind at any time from Settings → Ad Privacy within the app itself. Rejecting does not turn off ads: it makes them non‑personalized, which use less data.

3.2 Tracking transparency on iOS (ATT)

On iPhone and iPad the system asks whether you allow cross‑app tracking. If you