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- Interruption: failed mid-write leaves original intact (no truncation, no temp leftover); a sync that drops after N files resumes cleanly on the next sync with all content byte-intact (real network-drop simulation). - SFTP: live round-trip test against an SFTP server (connect/upload-atomic/ list/download/overwrite/special-name/delete); skips if endpoint unreachable. - Scheduling: WorkManager request builders map Wi-Fi-only -> UNMETERED, charging-only -> requiresCharging, interval, input data, and tags correctly.
SyncFlow
Native Android file sync app — sync any folder to WebDAV, SFTP, Nextcloud, ownCloud, Google Drive, Dropbox, or OneDrive.
Features
- Multi-provider — WebDAV, SFTP, SFTPGo, Nextcloud, ownCloud, Google Drive, Dropbox, OneDrive
- Flexible sync — one-way upload, one-way download, or two-way mirror
- Auto-sync — schedule by interval or trigger on Wi-Fi connect / device charge
- Conflict resolution — keep local, keep remote, keep newer, or keep both
- Secure — credentials encrypted with Android Keystore; biometric app-lock option
- No cloud dependency — runs fully on-device, no third-party relay
Install
- Download
SyncFlow.apkfrom the latest release - On your Android phone: Settings → Apps → Install unknown apps → allow your browser/file manager
- Open the downloaded APK and tap Install
- Open SyncFlow, go to Accounts tab → Add Account, pick your provider and sign in
- Tap + on the Syncs tab to create your first sync pair
Supported Providers
| Provider | Auth |
|---|---|
| WebDAV | Username + password |
| SFTP | Password or private key |
| SFTPGo | Username + password |
| Nextcloud | Username + password |
| ownCloud | Username + password |
| Google Drive | OAuth 2.0 (PKCE) |
| Dropbox | OAuth 2.0 (PKCE) |
| OneDrive | OAuth 2.0 (PKCE) |
Requirements
- Android 8.0+ (API 26)
- Storage permission (or SAF picker) for local folder access
License
SyncFlow is source-available, not open-source — see LICENSE. You may read, study, and fork it for personal, non-commercial use, but redistributing or publishing the app (source or APK) is not permitted. Only the copyright holder publishes official, signed builds.