Privacy Policy

1. Information we collect

If you play as a guest

You can use Diamond Painting: Gem Coloring without signing in. Your painting progress is then stored only on your device. We do not receive it.

If you sign in with Google (optional)

Signing in lets your progress follow you to another device. Through Firebase Authentication we receive your Google account's user ID, email address and display name, and use them only to identify your account and keep your saved paintings with it.

Your painting progress

For each picture you work on we save which cells you have filled and with which gem color, along with your list of recently opened pictures. For signed-in players this is stored in Google Cloud Firestore under your account; for guests it stays on the device.

Purchase check

Diamond Painting: Gem Coloring is a paid app. When it opens, it asks Google Play (using the Play Integrity API) to confirm that the Google account on the device owns the app, for example that the purchase wasn't refunded. Google Play returns a licensing verdict along with basic information about the app install and device. We use it only for this check and do not store it.

Usage and analytics

The app uses Google Analytics for Firebase to understand how it is used: screens viewed and features used (for example, which picture packs are opened), plus device and app information such as device model, operating system version, app version and language. For signed-in players these events are linked to the account's internal user ID. The app also has access to the Android Advertising ID, which Google Analytics for Firebase can use for features such as Google Signals and audience reports.

2. How we use it

• To save and restore your painting progress, across devices if you sign in.
• To confirm that the app was purchased through Google Play.
• To understand which features are used and improve the app, using analytics.
• To answer you if you contact us.

We do not show ads in the app and we do not sell your personal information.

3. Where your information is stored

Account and progress data is stored in Google Firebase (Authentication and Cloud Firestore), operated by Google LLC, and may be processed in the United States. Firestore security rules allow only your signed-in account to read or write your progress. All communication with Firebase uses encrypted HTTPS connections. A copy of your progress is also cached on your device so the app works smoothly.

4. Service providers

We use these Google services to run the app, each under Google's Privacy Policy:

• Google Sign-In and Firebase Authentication: optional sign-in.
• Cloud Firestore and Cloud Storage for Firebase: saving your progress and delivering the picture packs.
• Cloud Functions for Firebase and Google Play Integrity: the purchase check.
• Google Analytics for Firebase: usage analytics as described above.
• Google Play: app distribution and payment. We never receive your payment details.

We do not share your information with anyone else, except if required by law.

5. Device permissions

The app uses the Internet permission (for sign-in, cloud saves, picture packs and the purchase check) and the Advertising ID permission (used by Google Analytics for Firebase). It does not access your camera, microphone, location, contacts or photos.

6. How long we keep it

Account and progress data is kept for as long as your account exists. When you ask us to delete your account, we delete it from Firebase Authentication and Cloud Firestore and remove the analytics user ID link. Google Analytics data is kept according to the retention period set for the app in Google Analytics, after which it is deleted automatically.

7. Your choices

• Play as a guest so nothing is synced to us.
• Delete your account and data at any time on our account deletion page.
• Clear data on your device in Android Settings › Apps › Diamond Painting: Gem Coloring › Storage › Clear data.
• Reset or delete your Advertising ID in Android Settings › Google (or Privacy) › Ads.

8. Your rights

Depending on where you live (for example under the GDPR in the EU and UK, or state laws such as the California Consumer Privacy Act), you may have the right to access, correct, delete or receive a copy of the personal information we hold about you, to object to or restrict how it is used, and to complain to your local data protection authority. Contact us to use any of these rights. We answer within 30 days and will not treat you differently for using them. We do not sell or share personal information for cross-context behavioral advertising.

9. Children

Diamond Painting: Gem Coloring is not directed at children under 13, and we do not knowingly collect personal information from them. If you believe a child has given us personal information, contact us and we will delete it.

10. Changes to this policy

If we change this policy, we will update the date at the top of this page. For important changes we will also let you know in the app or on its Google Play listing before they take effect.

11. Contact us

Questions or requests about this policy or your data:

P1x3l P3rf3ct Studios
Diamond Painting: Gem Coloring
[email protected]