Last updated: September 20, 2026
This Privacy Policy explains how Quiet Cipher: Cryptogram ("the App", "we") handles information when you use our Android mobile application. The App is published by Crumble Studio.
Quiet Cipher: Cryptogram is developed by Crumble Studio. For privacy questions and requests, contact [email protected].
Puzzle progress, settings, and game resources are stored locally on your device. English and Russian have separate puzzle progress. Purchased entitlements and resource balances are shared between languages. The app does not create its own sign-in account or send puzzle progress to a developer-operated server.
The app uses Google Mobile Ads for rewarded and interstitial ads. The SDK may process your IP address, interactions with the app and ads, diagnostic information, and device or account identifiers for advertising, analytics, and fraud prevention. SDK traffic is encrypted in transit. Google UMP handles available consent settings before ad requests.
Google's privacy policy: https://policies.google.com/privacy
We use Google Analytics for Firebase to understand how players use the game (for example, which puzzles are started and completed). It collects app usage events and an app instance identifier. Advertising ID collection and ad personalization signals are turned off in Analytics.
Google Play and RevenueCat process purchases and verify entitlements. The developer does not receive your payment-card details. RevenueCat processes purchase history and technical information needed to verify transactions. The app does not supply a custom account ID or additional advertising-attribution attributes to RevenueCat; the SDK may assign its own identifier.
RevenueCat's privacy policy: https://www.revenuecat.com/privacy/
Google and RevenueCat handle the data needed for advertising, analytics, and purchases under their own policies and retention practices. The developer does not sell local puzzle progress or maintain a separate player-profile database.
Settings lets you reset local progress for both languages. A reset also resets game resource balances; switching languages does not. Your purchase receipt history and permanent no-ads/supporter entitlements are retained during the local reset. A local reset does not delete records held by Google or RevenueCat.