Privacy Policy

1. Overview

PullDoku ("the app") is a card puzzle game for Android developed by Universal Cores. Your gameplay — progress, preferences, Champion Cups and Joker inventory — is stored locally on your device.

The app has exactly one online feature: the optional global ranking, which requires signing in with a Google account. If you never sign in, PullDoku collects no personal data at all.

2. Data Stored Locally

The following data is saved only on your device, in the app's private storage:

• Game preferences: language, theme, volume levels, vibration and sound toggles, selected music track.
• Game progress: wins, Champion Cups balance, purchased Jokers, unlocked music tracks and daily victory streak.

This data never leaves your device, we never read it, and it is deleted automatically when you uninstall the app.

3. Optional Google Sign-In & Global Ranking

If you choose to sign in with Google to join the global ranking, the app receives from your Google account: your display name, your profile picture URL and a unique account identifier.

To operate the leaderboard, the following is stored in our database (Google Cloud Firestore):

• Your display name and avatar URL — shown to other players in the ranking.
• Your accumulated monthly score and total wins — scores reset on the 1st of each month.

We never receive your email password, contacts, or any other Google account data. Signing in is entirely optional and can be reversed at any time by signing out from the main menu.

4. Internet Usage

All gameplay runs fully offline. The app only performs network requests for two purposes: authenticating your optional Google sign-in and reading/writing the global ranking.

There are no ads, no analytics SDKs, no tracking pixels and no data brokers involved — in the app or on this website.

5. Android Permissions

PullDoku requests only the permissions strictly required for its features:

• INTERNET / ACCESS_NETWORK_STATE — used exclusively for the optional Google sign-in and the global ranking.
• VIBRATE — haptic feedback when you score a combo. Can be disabled in settings. No data involved.

No other permissions are requested. The app does not access your contacts, camera, microphone, storage, or location.

6. Third-Party Services

The optional ranking feature is built on Firebase Authentication and Cloud Firestore, services operated by Google LLC. Their processing of data is governed by the Google Privacy Policy and the Firebase Privacy documentation.

This website is a static HTML page. It uses Google Fonts and the Google tag (gtag.js) for aggregate, non-identifying visit measurement, subject to the Google Privacy Policy.

7. Children's Privacy

PullDoku is suitable for all ages. The game itself collects no personal information. The optional Google sign-in for the ranking is subject to Google's own age requirements for holding an account. We do not knowingly collect information from children.

8. Changes to This Policy

We may update this Privacy Policy if the app gains new features that affect data handling. Any changes will be posted on this page with an updated effective date.

9. Your Rights & Data Deletion

Under regulations such as GDPR (EU) and CCPA (California), you have the right to access, correct, or delete personal data held about you.

• Local data — fully under your control: uninstall the app to erase it.
• Ranking data (name, avatar, score) — sign out to stop submitting scores, and email us to request permanent deletion of your leaderboard entry. We delete it within 30 days.