Privacy Policy
Introduction
Fuji Bit Inc. ("we") respects the privacy of users of "Labyrinth of Probability" (the "App") and is committed to protecting personal information. This Privacy Policy explains what information the App collects and how it is used.
Information We Collect
The App does not collect personally identifying information (such as your name, address, or phone number). However, the following features and third-party services may collect or transmit certain information.
Google AdMob (Ads)
The App uses Google AdMob to display ads. AdMob may collect device identifiers, IP address, and ad interaction information to deliver and optimize ads. See Google's privacy policy for details.
The in-app purchase "Remove Ads" stops the display of ads and AdMob's related data collection.
Online Leaderboards (Firebase)
The App uses Google Firebase (Authentication / Cloud Firestore) to provide online leaderboards. The following leaderboard-related information is sent to and stored in the cloud:
- Anonymous account identifier (UID): a random ID automatically generated by Firebase anonymous authentication. It is not linked to your name or email address.
- Display name (nickname): a name you enter for leaderboard display. If left blank, a random name is generated.
- Game results: play results such as score, rooms reached, win/loss, difficulty, chosen build, and fate.
This information is intended to be shown to other players. If you do not use the leaderboards (do not set a nickname), your game results are not sent to the cloud.
Account Linking (Apple / Google)
To carry your leaderboard scores across device changes or reinstalls, you may optionally link an Apple ID or Google account. If you link an account, an account identifier and email address provided by Apple / Google may be obtained and stored through Firebase Authentication for sign-in. Linking is optional, and you can remove it at any time using the "Unlink" action in the App.
In-App Purchases (App Store / Google Play)
In-app purchases are processed through Apple's App Store on iOS and Google Play Billing on Android. We do not directly obtain payment information. The available purchases are "Remove Ads" and "Unlock Chain Caster build," both one-time (non-consumable).
Local Data Storage
Game progress and recent score history are also stored on your device. On-device data is removed when the App is uninstalled. Only when you use the online leaderboards above, ranking data is also stored in the cloud (Firestore) as described.
Sharing with Third Parties
We do not sell or provide your information to third parties, except for transmission to the third parties above (Google / Apple) as necessary to provide advertising, analytics, and leaderboard features.
Data Deletion
If you wish to delete data sent to the online leaderboards (anonymous UID, nickname, scores, linking information), please follow the steps on the Account & Data Deletion Request page. On-device local data can be deleted by uninstalling the app.
Children's Privacy
The App does not knowingly collect personal information from children under 13.
Changes to This Policy
This Privacy Policy may be updated as needed. If there are significant changes, we will notify you on this page.
Contact
For questions about this Privacy Policy, please contact us at:
Last updated: June 14, 2026