amir
ec478531da
Three root causes found via live logcat on device: 1. concurrent refresh() race: onStartCommand received twice causes two refresh() coroutines to run in parallel, doubling FileObserver and catchupScan registrations. Fixed with Mutex.withLock on refresh(). 2. catchupScan no cooldown: catchup syncs write files but never set syncCooldownUntil, so every written file immediately re-triggers onChangeDetected. Fixed by setting cooldown before enqueue and watching work completion same as onChangeDetected does. 3. CancellationException caught silently: exception handler catch(_: Exception) was catching CancellationException and resetting cooldown to 0L, re-opening the loop. Fixed by rethrowing CancellationException and setting 60s cooldown on other errors. Icon: interlocked rings (blue/red/green/orange) with sync arrow at center, pure black background — matches reference image. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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