BubbleSort — by CassiGames · Last updated: August 8, 2026
BubbleSort is a casual puzzle game developed by CassiGames. We respect your privacy and keep things simple: we collect as little as possible, we don't sell your data, and everything that leaves your device is listed below.
We want to be clear up front. BubbleSort does not collect:
BubbleSort requests no sensitive permissions from your device.
BubbleSort shows advertisements through Google AdMob. Since version 1.1.03 (August 2026), AdMob operates in "mediation" mode — when AdMob doesn't have an ad to show, partner ad networks are given the chance to serve one instead. This increases fill rates and results in more relevant advertisements.
The following mediation partners are currently integrated:
Additional mediation partners may be added in future updates. The complete, up-to-date list of authorized advertising partners is publicly available in our app-ads.txt file, following the IAB Tech Lab specification.
To serve ads, these networks may collect your device's advertising identifier (Advertising ID), general region (country/city level inferred from IP), and interaction data with the ads themselves. Each network processes this data under its own privacy policy:
All ads are filtered to the Teen (T) content rating or lower, so no mature themes, violence, or inappropriate content will be shown.
BubbleSort offers a one-time "Remove Ads" purchase that disables interruptive advertisements. Rewarded ads (the ones you choose to watch for in-game rewards) remain available but are always optional.
In the European Economic Area, the UK, and Switzerland, BubbleSort uses Google's User Messaging Platform (UMP) to ask for your consent before showing personalized ads. On first launch (or after your previous choice expires) you'll see Google's consent form explaining what data is used and giving you the choice between:
Your choice is remembered by the UMP SDK on your device and passed through to all mediation partners. You can change it at any time in Settings → Ad Preferences — this reopens the same Google consent form so you can grant or withdraw consent without reinstalling the app. This satisfies your right to withdraw consent at any time under the GDPR.
Outside the EEA/UK/Switzerland, no consent form is shown because one isn't required, and the "Ad Preferences" button is hidden.
In release builds, BubbleSort uses Firebase Crashlytics to help us find and fix bugs. When the app crashes, Crashlytics sends Google a technical crash report containing:
Crash reports do not include any personal information, game content, or account data. Crashlytics is disabled entirely in debug/development builds.
From version 1.1.0 (May 2026) onwards, BubbleSort uses Firebase Analytics to understand how the game is played and to improve it. Analytics collects:
Analytics data does not include your real name, email, or any account identifier. It is processed by Google under their own privacy policy. Analytics is disabled in debug/development builds.
If you have opted out of personalized ads via the consent form, advertising-identifier-based events in Analytics are also affected accordingly.
From version 1.1.02 (June 2026) onwards, BubbleSort uses Firebase Performance Monitoring to help us identify slow operations on real-world devices — such as long app start times or slow cloud saves — so we can optimize the experience across a wide range of phones.
Performance Monitoring collects:
No personal information is collected. Performance data is anonymous and aggregated across users. This feature is disabled in debug/development builds.
BubbleSort uses Firebase Remote Config to deliver in-game events such as launch celebrations, seasonal gifts, and announcements without requiring an app update. Remote Config sends Google your app version, locale, and an anonymous app instance ID to determine which event applies to your device. No personal data is involved.
BubbleSort offers optional in-app purchases (currently only: "Remove Ads") processed entirely through Google Play Billing. Google handles payment and receives your payment details — CassiGames never sees or stores any card or billing information. We only receive a purchase token from Google confirming the purchase was completed.
Signing in with Google Play Games is optional. If you sign in, we use your Google Play Games player ID to sync your game progress (level completion, star ratings, power-up inventory, streak data) to Google's cloud so you can restore it on another device or after reinstalling.
We do not receive your email address, real name, or any other profile information from your Google account. You can disconnect your account at any time through your device's Google Play Games settings.
If you don't sign in, all game progress is stored locally on your device only.
BubbleSort uses Google's in-app update and in-app review services (part of Google Play Services) to:
These services are provided by Google Play and do not send any new personal data to us — they're handled entirely by the Google Play app on your device.
BubbleSort is suitable for all ages. We do not knowingly collect personal information from children under 13, in line with the Children's Online Privacy Protection Act (COPPA). Google Sign-In is optional and not required to play. Advertisements are filtered to Teen rating or lower — no mature themes, graphic violence, or inappropriate content will be shown.
If you believe a child under 13 has provided us with personal information, please contact us and we will promptly delete it.
CassiGames does not sell, trade, or share your personal data with third parties for their own marketing purposes. The third-party services integrated in the app (listed above and in our app-ads.txt file) each receive only the data necessary for their function — ad serving, crash reporting, analytics, cloud save, or performance monitoring — and process that data under their respective privacy policies.
Game data (level progress, power-up inventory, settings) is stored locally on your device. If you sign in with Google Play Games, that progress is additionally synced to Google's cloud. Uninstalling the app removes all local data; cloud-saved progress can be restored by signing in again on any device.
We may update this privacy policy from time to time. Any changes will be reflected on this page with an updated date. Continued use of the app after changes constitutes acceptance of the updated policy.
Questions about this policy? Reach us at info@cassigames.nl.