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Zimly: S3 Backup vs Autosync: catalog facts
Zimly: S3 Backup	Autosync
Free Free and open source under GPL-3.0-only.	Freemium Free to install from Google Play, with paid upgrades in the app.
Android	Android
Works with any S3-compatible storage Supports self-hosted MinIO and AWS S3	Automatic background sync between Android and cloud storage Supports many services, including WebDAV and SMB
Requires your own S3 storage and credentials Android only	Android only Closed source
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0-only	License not stated
No account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.