Last updated: April 1, 2026
This Privacy Policy describes how David Aerni (“I”, “me”, or “my”) handles information in connection with the mobile applications published on Google Play and the Apple App Store.
My apps are designed with privacy in mind. As a general principle, I do not collect, store, or transmit any personal data to external servers.
All user-generated content (such as journal entries, notes, and preferences) is stored exclusively on your device using local storage. This data never leaves your device and is not accessible by me or any third party.
My apps may use the following third-party services:
Google Play Billing Some apps offer optional in-app purchases (e.g. premium themes). These purchases are processed entirely by Google Play. I do not collect or store any payment information. Please refer to Google’s Privacy Policy for details.
Google AdMob Some apps may display advertisements provided by Google AdMob. AdMob may collect device identifiers and usage data to show relevant ads. You can opt out of personalized advertising in your device settings. Please refer to Google’s Privacy Policy for details.
Some apps may request device permissions (e.g. biometric authentication, storage access for backup/export). These permissions are used solely for the stated functionality and are never used to collect personal data.
My apps are not directed at children under the age of 13. I do not knowingly collect personal information from children.
Since all data is stored locally on your device, security depends on your device’s own security measures (e.g. screen lock, biometric protection). Some apps offer additional in-app PIN or biometric lock features for extra protection.
I may update this Privacy Policy from time to time. Any changes will be posted on this page with an updated date. Continued use of my apps after any changes constitutes your acceptance of the new policy.
If you have any questions about this Privacy Policy, please contact me at:
David Aerni
polygonya.dev@gmail.com