Privacy Policy for Lumen

Effective date: October 31, 2026
Developer: The Craft Nest
App: Lumen
Package name: com.tcnthecraftnest.lumen

This Privacy Policy explains what information The Craft Nest ("we", "our", "us") collects when you install and play Lumen, how we use it, and the choices you have.

1. Information we collect

Sign-in: Lumen starts with an anonymous guest account, which Firebase Authentication creates for you with a unique user ID. You can optionally sign in with Google, in which case Firebase Authentication stores your Google name, email address and user ID.
Game progress: Your missions, progress and settings are saved to Cloud Firestore against your user ID so they carry over between devices. Some progress is also kept on your device.
Leaderboard: Weekly leaderboard entries show your display name and your score to other players. Your display name comes from your Google account, or is a default name for guest players. Leaderboard entries are public, so they stay visible to other players until they are deleted.
Usage and diagnostics: Firebase Analytics records gameplay events such as when a run starts or ends and how ads are shown. Firebase Crashlytics collects crash reports and non-fatal error details, including device model, operating system version and app version.
Game configuration: Firebase Remote Config fetches game and ad settings. It does not collect personal information.
Purchase records: When you buy an item, Google Play provides the product ID and purchase confirmation so your purchase can be restored.
Advertising identifier: Google Mobile Ads uses your device's advertising ID to show ads and limit repeated ads. You can reset or delete it in your Android settings.

2. What we do not collect

We do not collect your precise location, contacts, photos or microphone audio. Lumen uses your device's motion sensor (accelerometer) only to read tilt for controls while you play. Tilt readings are used on your device during play and are not stored or sent to us. Card and billing details are handled only by Google Play.

3. How we use information

To run the game, sign you in, and keep your progress and purchases synced.
To show the leaderboard and to prevent abuse of scores.
To understand how the game is played, fix crashes, and improve stability.
To show ads and to prevent abuse of the game economy.

4. Third-party services

The app uses these Google services. Each one handles data under its own privacy policy:

Firebase Authentication and Cloud Firestore: sign-in, cloud save and leaderboard.
Google Sign-In: optional Google account sign-in.
Firebase Analytics, Crashlytics and Remote Config: usage analytics, crash reports and game settings.
Google Mobile Ads (AdMob): banner, interstitial and rewarded ads. Google Privacy Policy
Google Play Billing: in-app purchases.

5. Ad consent

Where required by law, such as in the European Economic Area, the United Kingdom and Switzerland, we use Google's User Messaging Platform to ask for your consent before personalised ads are shown. You can change your choice in the consent settings within the app, where offered.

6. Permissions

The app uses internet access and network state (to connect to sign-in, cloud save, analytics and ads), the advertising ID (for ads), and billing (for in-app purchases). These are added by the Google libraries the app uses.

7. Children's privacy

Lumen is not directed at children under 13. We do not knowingly collect personal information from children under 13. If you believe a child has given us personal information, contact us and we will delete it.

8. Data retention and deletion

We keep account, progress and leaderboard data for as long as your account exists. You can ask us to delete your account and all associated game data at any time.

To request deletion: email tcnthecraftnest@gmail.com with the subject Data Deletion Request - Lumen. If you signed in with Google, include the email address of that account. If you played as a guest, include your device model and the approximate dates you played so we can locate your data. We will delete your Firebase account, Cloud Firestore data and leaderboard entries within 7 business days and confirm by email. Analytics and crash data is kept for a limited period under Google's standard retention settings and is not linked to your name.

9. Security

Data sent between the app and our services uses HTTPS/TLS encryption. Access to cloud data is limited to the account that owns it, except leaderboard entries, which are public by design.

10. Changes to this policy

We may update this policy. The updated version will be posted on this page with a new effective date.

11. Contact us

For questions about this policy, contact tcnthecraftnest@gmail.com.