Inkdoku Privacy Policy

Effective date: 2026-11-02

Inkdoku is a sudoku puzzle game: you solve puzzles in five difficulty levels and a daily puzzle, use notes and step-by-step hints, and see your streak and best times. It also has reminders and a home screen widget (the "app"). It is provided by DDJ A1 ("we", "us"). This policy explains what data the app handles and how. Inkdoku has no account system and we do not run a server for it.

Data stored on your device

The puzzle you are playing (numbers, notes and time), your results per difficulty (puzzles solved, best and total time), the days you solved the daily puzzle, and your settings (game options, theme, reminders) are stored only on your device. They are not sent to us. Puzzles are generated on your device and work offline. Uninstalling the app deletes this data from your device. If device backup is turned on, Android's standard app backup may include this data in your own Google account backup. That backup is controlled by you and Google, not by us.

Sharing

When you use Share result, the app hands a short text (difficulty and solve time) to the app you pick in the Android share sheet. The app does not upload anything by itself.

Permissions the app asks for and why

• Notifications (optional). Used for a morning note when the daily puzzle is ready and an evening note if you haven't played. You can decline and every feature still works.
• Run at startup. Lets reminders and the home screen widget come back after your phone restarts or the time zone changes.
• Vibration. A light tap when you enter a number, and for reminders if you turn vibration on.
• Internet access and the advertising identifier (AD_ID). Used only by the advertising components described below. Puzzles work offline.

The app does not request the camera, the microphone, location permission or your contacts.

Information collected automatically

When you use the app, third-party SDKs used for advertising may collect some information automatically, including:

• 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 your device's operating system and model, and ad performance data

The advertising SDK collects this information and shares it with Google (AdMob) and its advertising partners for advertising, analytics, fraud prevention, security and compliance. It is encrypted in transit. The app itself does not send your game data off your device, and we do not link the advertising data to it.

Advertising

The app shows advertisements from Google AdMob:

• a banner at the bottom of the screens
• an ad when the app starts from the launcher
• full-screen ads only between games: when you open the result screen after solving a puzzle, and when you start a new game from the home screen
• an ad in the exit dialog
• an optional video ad you can choose to watch from Settings to see fewer ads for 24 hours

A full-screen ad never appears while you are solving a puzzle, when you use a hint, or when you open the daily puzzle. To serve ads, AdMob and its partners may access your device's Advertising ID and the information described above. In the European Economic Area (EEA), the United Kingdom and other regions where required, the app shows a consent form through Google's User Messaging Platform (UMP) before personalized advertising data is used. If you decline, you are shown non-personalized ads 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.

Children

Inkdoku is a general-audience puzzle game and is not directed to children under 13. We do not knowingly collect personal information from children.

Your rights

Your game data exists only on your device, so you control it directly, and uninstalling the app removes everything the app stored. Depending on where you live (for example under the GDPR in the EEA/UK or the CCPA in California), you may also have rights over data processed by advertising SDKs. You can exercise your ad 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.