Syncthing

Android App
https://play.google.com/store/apps/details?id=com.nutomic.syncthingandroid

Ubuntu Installation
Add the release PGP keys...

curl -s https://syncthing.net/release-key.txt | sudo apt-key add -

Add the "release" channel to your APT sources...

echo deb http://apt.syncthing.net/ syncthing release | sudo tee /etc/apt/sources.list.d/syncthing-release.list

Update the packages list...

sudo apt-get update

Install syncthing...

sudo apt-get install syncthing

Thanks - http://apt.syncthing.net/

Ubuntu Usage
Start Syncthing...

syncthing

...and wait for your web browser to load the GUI interface.

http://docs.syncthing.net/intro/getting-started.html

Links
https://syncthing.net/

http://docs.syncthing.net/intro/getting-started.html

https://play.google.com/store/apps/details?id=com.nutomic.syncthingandroid

https://github.com/icaruseffect/syncthing-ubuntu-indicator

https://github.com/syncthing

http://sysads.co.uk/2015/03/how-to-install-syncthing-0-10-27-recently-released/

http://sysads.co.uk/2014/06/syncthing-open-source-replaces-dropbox-bittorrent-sync/

http://www.webupd8.org/2015/05/official-syncthing-debian-ubuntu.html

Nice video - https://youtu.be/ycVM5pdH3xg?t=880