abstrakt engine — Privacy Policy

Last updated: May 11, 2026

abstrakt engine is a music visualizer and MP4 export tool for Android, developed by Jonathan Kendall. This policy explains what data leaves your device and why.

What the app sends off your device

Anonymous crash reports

The app uses Firebase Crashlytics (Google) to report unhandled crashes and non-fatal exceptions. A crash report contains:

• The stack trace (code location where the crash occurred)
• Device model and Android version
• App version code
• An anonymous installation identifier (not tied to your Google account or any personal identity)

Crash reports do not contain your audio files, photos, custom skins, exported videos, or any personal data. You can opt out in the app at any time: open Settings → Privacy → Crash reporting.

Advertising data (free version only)

The free version of abstrakt engine displays banner and interstitial ads via Google AdMob. When ads are shown, AdMob may collect:

• Advertising ID (a resettable identifier you can change or disable in Android Settings → Privacy → Ads)
• Approximate device location (city-level, derived from IP address)
• Device type, OS version, and app version
• Ad interaction events (impressions, clicks)

Google uses this data to serve relevant ads and prevent ad fraud. See Google's Privacy Policy for details on how Google handles this data.

If you purchase abstrakt engine Pro (the one-time $2.99 in-app purchase to remove ads), the AdMob SDK is disabled and no advertising data leaves your device.

Camera (optional, on-device only)

abstrakt engine lets you capture photos with your device camera to use as custom skins/textures for the visualizer. When you tap the camera button, the app requests camera permission via the standard Android permission dialog. You can decline, and the rest of the app continues to work normally.

Photos captured this way are stored on your device only. They are not uploaded to any server, shared with any third party, or transmitted off your device. If you choose not to grant camera permission, you can still use existing photos from your device as custom skins via the image picker.

What the app does NOT do

• The app does not require an internet connection for visualization or export. Both work entirely offline.
• The app does not have user accounts, sign-in, or any identity system.
• The app does not use third-party analytics beyond what's described above (Firebase Crashlytics for crash reports, AdMob for advertising on the free version).
• The app does not access your contacts, location (beyond AdMob's IP-derived city-level estimate), calendar, messages, or any personal data on your device beyond files you explicitly select and photos you capture with the camera.
• The app does not sell, share, or transmit your audio, photos, custom skins, or exported videos to any third party.

Permissions

The app requests only the permissions it actually uses:

• READ_MEDIA_AUDIO — to open audio files you select from your device storage
• READ_MEDIA_IMAGES — to open image files you choose as custom skins
• RECORD_AUDIO — to visualize live microphone input when you tap the mic button
• CAMERA — to capture photos for use as custom visualizer skins, only when you tap the camera button
• INTERNET — required by Firebase Crashlytics and Google AdMob (both need network access); the core visualizer and export run without it

Children's privacy

abstrakt engine is not directed at children under 13. The app contains advertising served by Google AdMob, which means it is not suitable for deployment in contexts subject to COPPA (U.S. Children's Online Privacy Protection Act) or similar children's privacy regulations without additional controls.

Data retention

Crash reports are retained by Firebase according to Firebase's data retention policy. The app itself retains no data on any server — the developer has no backend.

Changes to this policy

If the data practices described here change materially, this page will be updated and the "Last updated" date will change. The canonical URL for this policy is https://onojk.github.io/abstrakt-engine/privacy.html.

Contact

Questions about this privacy policy: onojk123@gmail.com