apt-update-indicator

Update indicator for apt-based distributions.

Features

Uses pkcon refresh by default
Uses apt upgrade -y by default to upgrade
Optional update count display on panel
Optional notification on new updates (defaults to off)
Available in English, French and Spanish

One-click install

https://extensions.gnome.org/extension/1139/apt-update-indicator/

Manual install

To install, simply download and execute make install

Credits

Forked from https://github.com/RaphaelRochet/arch-update ! Thanks @lucatrv for all your input!