Ferry Sync (Cloud File Sync)

*** Update 01.09.2026 ***

Dear community,

I am happy to announce the release of Ferry Sync for Sailfish OS!

Ferry Sync is a native file sync and cloud browser app for Sailfish OS: connect it to your cloud server, browse your files, and keep local folders synchronized in both directions.

You can get it on:

Features in Version 0.4-1

  • Two-way folder sync (rclone bisync) per sync pair — a whole folder or just a single file
  • Upload only (one-way) (rclone copy) per sync pair — pushes a local folder to the remote and never deletes anything there; for camera or document backups
  • Currently implemented backends: Seafile, Nextcloud, SFTP, FTP/FTPS, PCLOUD
  • Remote browser: navigate your libraries/folders, create folders, upload, download, delete
  • Open files directly on the device: built-in text viewer, text editor and image viewer
  • Own file browser for uploads — all file types, multi-select
  • Background sync via systemd user timer: every 5 / 15 / 30 minutes, … – or manual only
  • Network rule: Wi-Fi only or Wi-Fi and mobile data synchronization
  • Safety limit against mass deletion: a run that wants to delete unusually much is aborted and waits for your explicit confirmation (“Force sync”)
  • Global exclude patterns, editable line by line (*.tmp, .thumbnails/**, …)
  • Per-run sync logs viewable in the app, plus a permanent diagnostics page for support cases
  • Cover action “Sync now” with status at a glance
  • Translations via Weblate

Supported Backends

For a full list of supported backends, please refer to Overview of cloud storage systems

If you want to use a backend that is not yet implemented and its on the list above, please create an issue on GitHub and I will add it.

Roadmap

  • Release on Jolla Store / CHUM + Jolla-Harbour-Compliance
  • Rename remote folders
  • edit and show .md files from remote browser
  • One-way-Sync (without re-uploading again)
  • One-way-Sync from the cloud to the phone

Technical Information

  • Qt 5.6.3 (Sailfish OS Silica UI) + Python 3 backend via PyOtherSide — no C++, no Java
  • rclone as the one and only transfer and sync engine, bundled in the RPM (aarch64, armv7hl, i486)
  • Background sync as a short-lived systemd user timer — no permanent daemon, no battery drain
  • Sandboxing is disabled (Sandboxing=Disabled): inside the jail the Secrets daemon socket is invisible and systemctl/python3 cannot be executed, which makes background sync and secure credential storage impossible
  • Tested on:
    • Fairphone 4 - Sailfish OS 5.0.0.62
    • Emulator - Sailfish OS 5.0.0.62

Links


Check out the full release notes on GitHub for a complete list of changes. If you would like to contribute, please send me a PM or create a pull request!

25 Likes

Thanks a lot for this app, it makes it very convenient to sync folders to nextcloud! With my short experience and testing, automated sync works reliably and respect the network rule. Until the one way sync is implemented, I’m using a separate folder on nc for JP fotos and it makes the backup job just fine.

One thing I noted; if I remove the last file from the folder so that the folder remains empty, and make it sync, the app gives an error notification “Sync state invalid - the next run will resync”, after which the “removed” file returns in the next sync. Same notification when trying to just sync an empty folder.

2 Likes

The „empty Folder Sync“ is a General thing with file Syncs I think - I will Check how I can fix the issue

Great app. Thank you. Is it a design choice, that I only can choose selective local folders? I wanted to use the app for whatsapp backup, which is also under /home/defaultuser/

Yes, currently I used as starting Point the Standard-Folders under Home, but I can also extend it to all Folders, if needed

1 Like

FTP would be nice. Or is there any other app that supports FTP?

1 Like

FTP is supported by rclone, so i can implement it as new backend.

Can I go with SFTP directly or do you need FTP?

3 Likes

Ideally both but for me FTP is the important one. SFTP is already working as console command but of course it would be more convenient to have a graphical SFTP client.

1 Like

Yes please, it would be great.

Ok, I see. I tried to use it to sync a temporary file transfer folder and I couln’t delete the last file.

I would use SFTP also. :slight_smile:

Thank you! Great app, really appreciated!

Is it possible to add an option to show md files in the cloud storage instead of downloading them? I can open and edit md files with the local filebrowser, so maybe it works with your file browser, too…

Yeah good idea, currently there is editing implemented for .txt Files only, but I think .md would be also a good fit - added it to the List for Features now

1 Like

I would like to translate the app to Norwegian bokmål.

@eson up for doing the Swedish translation?

2 Likes

Thank You guys for contributing :wink:

You can start Translate now or wait until Next Version 0.3 (with new requested Features ) is Ready

Im working on 0.3 in a Feature Branch already :slight_smile:

1 Like

Thank you for making this app!

Would you consider to make translations in to a Weblate project?

(I’ve started the translation to Norwegian for the current version)

1 Like

yes, for future changes weblate is easier - let’s have a quick talk per PM for details and first setup

1 Like

I will take a look at it! No promises, but in the queue. :wink:

1 Like

It would be nice if you could simply ignore invalid certificates

2 Likes

Is this different to Syncthing in a significant way?

yes, Syncthing is a file sync directly between one or more computers - no server inbetween, ferry sync acts as sync client for your cloud server backend.

my main purpose was to be able to sync folders bidirectional from my jolla phone to my own seafile cloud - and to browse, upload and download files manually from the cloud