Ding Ding Privacy Policy

Last updated: 2026-04-29

Ding Ding is a Hong Kong tram arrival and stop information app. This Privacy Policy explains how the app may access and use data.

App name: Ding Ding

Developer: Hinnes Lung

Contact: hinneslung@gmail.com

Information the app uses

• Location: if you allow location access, the app uses your current location to suggest nearby tram stops and show your current position on the map.
• App and device data: Google Mobile Ads, Google User Messaging Platform, Google Maps, AMap/Gaode Maps, and Firebase may process device identifiers, diagnostics, approximate interaction data, and related technical data needed to run the app, measure crashes, and support advertising.

What the app does not do

• Ding Ding does not require an account.
• Ding Ding does not store a personal profile on its own servers.
• Preferences such as saved stops, language, privacy notice status, and analytics settings are stored locally on your device.

Advertising

The app uses Google Mobile Ads to display ads. Before requesting ads, the app uses Google's consent flow to determine whether consent is needed and to present privacy choices where required.

On Android, Google may use the Advertising ID or comparable device data for advertising, fraud prevention, and measurement, subject to your consent choices and device settings. On supported iOS versions, Google may use the advertising identifier (IDFA) only if you grant App Tracking Transparency permission.

Analytics and crash reporting

The app includes Firebase SDKs for analytics and crash reporting. In the Android app, Firebase Analytics and Crashlytics remain off unless you allow anonymous analytics and crash reports in the first-launch privacy prompt or later enable Analytics & diagnostics in About > Data & Privacy.

How data is used

• to show tram stop, route, and map information
• to support advertising and related consent choices
• to diagnose crashes, errors, and app performance issues

Third-party services

• Hong Kong Tramways public arrival and stop data API
• Google Mobile Ads
• Google User Messaging Platform
• Google Maps
• AMap/Gaode Maps
• Firebase Analytics and Crashlytics

Your choices

• You can deny or revoke location access in Android or iOS Settings at any time.
• You can allow or decline anonymous analytics and crash reports in the first-launch privacy prompt, and turn Analytics & diagnostics on or off later inside About > Data & Privacy.
• If a Privacy Choices option is shown inside the app, you can use it to review or update ad consent choices.
• On supported iOS versions, you can deny tracking permission in iOS Settings.

Contact

For privacy or app questions, contact hinneslung@gmail.com.