Luckmark Privacy Policy

Effective date: 2026-10-14

Luckmark — an entertainment app that turns your date of birth into a daily lucky card (lucky number, lucky colour, lucky time, zodiac message and lottery-style number sets, for fun only) ("the app") is provided by DDJ A1 ("we", "us"). This policy explains what data the app handles and how. Luckmark has no account system and we do not operate a server for it.

Data stored on your device

Your date of birth, your daily lucky cards and history, lottery presets and your settings are stored only on your device and are not transmitted to us. The lucky results are calculated on your device. Uninstalling the app deletes this data from your device. Android's standard app backup may include this data in your own Google account backup if you have device backup enabled; that backup is controlled by you and Google, not by us.

Permissions the app asks for and why

• Notifications (optional). For a daily reminder that your new lucky card is ready. You can decline; the rest of the app keeps working.
• Run at startup. So the daily reminder is restored after your phone restarts.
• Internet access and the advertising identifier (AD_ID). Used only by the advertising components described below. Calculating your lucky card does not need the internet.

Information collected automatically

When you use the app, certain information may be collected automatically by third-party SDKs used for advertising. This may include:

• Your device's Internet Protocol (IP) address, which may be used to estimate your approximate (general) location
• Device or other identifiers, such as your device's advertising identifier (Advertising ID) and app set ID
• App interactions, such as session time, screens viewed, and ad views and taps
• Crash logs and diagnostic information, such as the mobile operating system and device model you use and ad performance data

This information is collected by the advertising SDK and shared with Google (AdMob) and its advertising partners for advertising, analytics, and fraud prevention, security and compliance purposes. It is encrypted in transit. The app itself does not send your date of birth off your device, and we do not link the advertising data to it.

Advertising

The app displays advertisements provided by Google AdMob: a banner at the bottom of some screens, an ad when the app starts, and full-screen ads only at natural pauses (for example after you reshuffle lottery numbers). To serve ads, AdMob and its partners may access your device's Advertising ID and the information described above. For users in the European Economic Area (EEA), the United Kingdom, and other regions where required, the app presents a consent form via Google's User Messaging Platform (UMP) before personalized advertising data is used; if you decline, non-personalized ads are shown instead. You can reset or limit ad personalization at any time in your device settings (Settings → Google → Ads), and you can change your consent choice from the app's Settings screen.

For more information on how Google uses data when you use partners' apps, see https://policies.google.com/technologies/partner-sites.

Entertainment only

Luckmark's numbers, colours and messages are for entertainment. They do not predict outcomes and do not guarantee any winnings. The app does not sell lottery tickets or offer gambling.

Children

Luckmark is not directed to children under 13. We do not knowingly collect personal information from children.

Your rights

Because your data exists only on your device, you are in direct control of it: you can change your date of birth in the app at any time, and uninstalling the app removes everything completely. Depending on your region (e.g. GDPR in the EEA/UK, CCPA in California), you may also have rights regarding data processed by advertising SDKs; you can exercise ad-related choices through the consent form and your device's ad settings described above.

Changes

We may update this policy. Material changes will be reflected on this page with a new effective date.

Contact

Questions? Email bloodturtle@naver.com.