Board Fever
privacy policy.

Effective date: October 27, 2026 · Publisher: PurvaKalpa

This Privacy Policy applies to the following apps published by PurvaKalpa (“we”, “us”): Chess: Knight Fever, Bingo Fever, Word Fever, Card Fever, and Board Fever (each, “the App”). It explains what information is involved when you use any of these apps. Where a practice applies to only some of the apps, we say so with a label.

In short: All apps are free, with no ads, no in-app purchases, no user accounts, no analytics, and no servers operated by us. We do not collect, sell, or share your personal data. Everything happens on your device, between players on your local network, in your own iCloud, or through your own Game Center account.

1. Information we collect

All apps. We do not collect personal information. There are no accounts, no advertising, no third-party analytics, and no servers operated by us. We do not sell or share personal data with anyone.

2. Local multiplayer [All apps]

Multiplayer connects devices directly over your local Wi-Fi or hotspot (Apple MultipeerConnectivity) using an encrypted connection. In Knight Fever, your real display name and identifiers are sealed (encrypted) before discovery, so they are not broadcast in the clear. Game moves, names, and chat travel only between the connected devices, never to us.

3. Chat, photos, and custom cards [All apps]

Any display name, chat message, emoji, photo, or custom Bingo card you send is transmitted only over the local network to the other players in your game. We do not host, monitor, or moderate this content. In Bingo Fever, a host may keep an on-device, encrypted audit log of a game; it is shared only if the host chooses to export it. Photos are chosen through Apple’s system picker; the apps do not browse or upload your photo library.

4. iCloud sync [All apps]

Your progress can be stored in your own private iCloud so it syncs across your devices. Knight Fever uses Apple’s CloudKit private database and iCloud key-value storage for your profile, saved games, match history, and puzzle progress. Word Fever uses iCloud key-value storage for your scores, daily puzzle streaks and records, and bot level. Bingo Fever uses iCloud key-value storage for your game history and stats. Card Fever uses iCloud key-value storage for your Daily Challenge streak and Solitaire stats; its game history and replays stay only on your device. Board Fever uses iCloud key-value storage for your stats and game history. This data lives in your Apple account; we cannot access it. See Apple’s Privacy Policy (https://www.apple.com/legal/privacy/).

5. Game Center [Knight Fever, Word Fever, Bingo Fever, and Card Fever]

If you sign in to Game Center, these apps submit your scores to leaderboards and report achievements through Apple’s Game Center, and features such as matches with friends run through it. This uses your own Game Center account under Apple’s terms and privacy policy; we do not receive your Game Center profile or contacts. You can sign out of Game Center in your device Settings at any time.

6. Notifications [Knight Fever and Card Fever]

Knight Fever uses on-device local notifications (for example, a nearby challenge), and Card Fever can send an optional Daily Challenge reminder that you turn on in its Settings. None of the apps use remote push notifications, and no notification data is sent to us.

7. On-device AI [Knight Fever and Word Fever]

Word Fever includes a word bot and, on supported Apple-silicon devices, an optional on-device AI model, plus a built-in offline word list for validating words. Knight Fever’s optional assistant and move coach use Apple’s on-device models where available; if you choose to download an open model in Settings, the app fetches it from Hugging Face, a public model library, with a standard download request. All AI features run entirely on your device: your questions, games, and play are not uploaded to us or to any third party.

8. Language and appearance settings [All apps]

Your choice of language, look, theme, and text size is stored only on your device (the language choice is the same setting as the per-app Language in your device Settings). Nothing about it is sent to us.

9. Device permissions

• Local Network [All apps]: to find and connect to nearby players.
• Camera [Knight Fever and Bingo Fever]: only if you scan a host’s QR code to join.
• Photos [Bingo Fever and Word Fever]: only when you pick a photo to send in chat (system picker).
• Microphone and Speech Recognition [Knight Fever]: only if you enable voice control or spoken-move input; speech is processed on device for accessibility and is not sent to us.

These permissions enable features on your device and are not used to collect data for us.

10. Data storage and security [All apps]

Local content is stored on your device. Sensitive records (such as the Bingo Fever host audit log and saved cards) are encrypted at rest using Apple’s CryptoKit (ChaCha20-Poly1305) with keys held only in your device Keychain. Peer-to-peer connections between players are encrypted in transit.

11. Children’s privacy

All apps are intended for a general audience, contain no ads and no purchases, and do not knowingly collect personal information from children. Local multiplayer chat and photos, where available, are sent only between players on the same local network and are not hosted or moderated by us; use these features with people you know.

12. Your choices

You can turn off iCloud sync and sign out of Game Center in your device Settings, and manage app permissions (Local Network, Camera, Photos, Microphone, Speech Recognition, Notifications) in Settings under Privacy and Security. Deleting an app removes its locally stored data from the device. Because no personal data is sent to servers operated by us, there is nothing for us to access, correct, or delete on a server.

13. Translations

This policy is available in several languages. If a translation differs from the English version, the English version applies.

14. Changes to this policy

We may update this policy from time to time. Material changes are reflected by updating the effective date above.

15. Contact

Questions about this policy or any of the apps? Email saras.app.support@gmail.com. See also our Terms of Use.