Last updated: April 7, 2026
Monster Compendium collects limited, anonymous usage data to improve the app experience. No personally identifiable information (name, email, location, etc.) is collected or stored.
Usage events are sent to Amplitude and Firebase Analytics to understand how the app is used. These events include:
Events contain only app interaction data — no personal identifiers are attached. Firebase Analytics is used on Android release builds only; Amplitude is used on Android and desktop.
On Android, crash and error reports are automatically sent to Firebase Crashlytics. These reports include device model, OS version, and a stack trace. No personal data is included.
The free version of the app displays banner ads served by Google AdMob on Android. AdMob may use device advertising identifiers and usage data to serve personalized ads in accordance with Google's Privacy Policy.
Premium subscribers do not see ads.
Subscription purchases on Android are processed through RevenueCat. RevenueCat receives purchase transaction data to validate and manage entitlements. See RevenueCat's Privacy Policy for details.
Data is shared only with the third-party service providers listed above (Amplitude, Firebase, Google AdMob, RevenueCat) for the purposes described. No data is sold to third parties.
If you have questions about this policy, open an issue at github.com/alexandregpereira/Monster-Compendium/issues or send an email to alexandregpereira.dev@gmail.com.