Cellium ("the game," "we," "us") is developed by Yellow Frog Development. This policy explains what information Cellium collects, how it is used, and who it is shared with.
Information we do not collect
Cellium does not require account creation, does not include chat or user-generated content, and does not collect your name, email address, contacts, location, or photos. Your game progress (score, unlocked cells, achievement progress, settings) is stored locally on your device and is not transmitted to us.
Information collected by third-party services
Cellium uses the following third-party services, each of which may collect data under its own privacy policy:
| Service | Purpose | Data involved |
|---|---|---|
| Google AdMob | Displays banner, interstitial, and rewarded video ads | Advertising ID, device/app information, ad interaction data, used for ad delivery and measurement |
| Google Play Games Services | Sign-in, achievements, and the global leaderboard | Your Google Play Games profile, achievement unlocks, and submitted high scores |
| Google Play Billing | Processes the one-time "Remove Ads" purchase | Purchase confirmation only — payment details are handled entirely by Google and are never seen by us |
We do not receive or store any of the above data ourselves — it is collected, processed, and controlled by Google under Google's Privacy Policy.
Advertising ID
Cellium uses the Android Advertising ID (or equivalent) to serve and measure ads through Google AdMob. You can reset or limit ad personalization for this identifier at any time in your device's system settings.
Children's privacy
Cellium is not directed at children and does not knowingly collect personal information from children. Advertising is served through Google AdMob in accordance with Google Play's policies for the app's declared audience.
Data retention and deletion
Local game progress can be erased at any time from the app's Settings screen ("Reset Progress"). This does not affect your purchases, or any achievements/leaderboard scores already recorded by Google Play Games Services, since those are controlled by your Google account rather than by Cellium itself.
Changes to this policy
This policy may be updated as the game changes. The "Last updated" date above reflects the most recent revision.
Contact
Questions about this policy can be sent to yellowfrogdevelopment@gmail.com.