Open Android Backup Companion — Open Source Productivity App

Back up your device without vendor lock-ins, using insecure software or root. Supports encryption and compression out of the box. Works cross-platform.

Open Android Backup Companion is the Android companion app, giving the backup script access to data otherwise not available to ADB. Open Android Backup is a tiny shell script & Flutter app that makes securely backing up Android devices easy, without vendor lock-ins or using closed-source software that could put your data at risk. It's based on ADB but doesn't use the deprecated adb backup command.

Data backed up:

• Apps (app data not included due to system limitations)
• Internal storage (pictures, downloads, videos, Signal backups if enabled, etc)
• Contacts (exported in vCard format)

SMS messages and call logs are also exported, albeit can't be restored.

Features:

• Automatically restores backed up data.
• Works on the 3 major operating systems, and supports any Android device.
• Backs up data not normally accessible through ADB using a native companion app.
• Tiny - the whole package is about 20 MB.
• Doesn't use proprietary formats: your data is safe even if this script ever gets lost. Simply open archives created by this script using 7-Zip.
• Backups are always encrypted along with their metadata.
• All data is compressed using 7-Zip with maximum compression settings.

For installation instructions (Linux, Mac, Windows) and usage instructions, head over to the project. You can also use this app standalone.