Privacy Policy
Blood Abacus
Behind Zero LLC built Blood Abacus to work without collecting personal information. This policy explains what the app stores, why, and where.
Information we do not collect
Blood Abacus has no user accounts and no sign-in. We do not collect or store:
- Names, email addresses, or contact information
- Device identifiers or advertising identifiers
- Location data
- Photos, contacts, or other personal content
- Analytics, usage tracking, or crash reporting data
The app contains no advertising and no third-party tracking software.
Local multiplayer
When you play over Bluetooth, game information is exchanged directly between the participating devices. Nothing is sent to us or to any server.
Online multiplayer
When you host or join an online game, a small amount of temporary game state is stored using Google Firebase Firestore so that all players stay in sync. This consists of:
- A randomly generated room code and the session's status
- The display name you choose when joining, which is not tied to any account and need not be your real name
- Life totals, commander damage, avatar selection, and in-game statistics
This information exists only to run the game in progress. It is not linked to you as an individual, is not used for advertising or profiling, and is never sold or shared.
Because a display name is visible to everyone in your session, please avoid entering personal information there.
Data retention
Online session data is kept only as long as needed to support active and recent games, and is removed periodically. It is not archived or used for any other purpose.
Service providers
Online multiplayer relies on Google Firebase Firestore for session synchronization. Firebase processes this data on our behalf under Google's privacy terms. We use no other third-party services.
Children's privacy
Blood Abacus does not knowingly collect personal information from anyone, including children under 13. Because the app has no accounts and collects no identifying information, no personal data is gathered from any user regardless of age.
Purchases
If the app offers a paid upgrade, purchases are handled entirely by Apple through the App Store. We do not receive or store payment details.
Changes to this policy
We may update this policy as the app develops. Changes will be posted on this page with a revised date above.
Contact
Questions about this policy can be sent to support@behindzero.com.