Location & privacy
Location is opt-in
“Use my location” or “Enable GPS” in practice mode requests geolocation. Practice mode processes location approximately every 5 seconds while visible and pauses in the background. Locations and trip statistics stay in page memory; they are not stored in D1 or sent to our server. Leaving or reloading clears them.
Spoken prompts
Local device voices are preferred. If no matching local voice is available, system-default speech requires your choice and may process road names and prompt text online. GPS coordinates are not included.
Search and language preferences
City or area search terms are processed by the server. The page URL determines the language: English has no language prefix; Chinese uses /zh/.
Maps and external links
Loading a map requests only the visible map tiles from OpenStreetMap. Video and directions links open YouTube or a mapping service under their own privacy policies. The route map does not use your location.
Essential hosting logs
Cloudflare may process network requests and security logs needed to provide the service. This site does not add advertising trackers or location history.