It's FOSS - https://itsfoss.com/zzupdate-upgrade-ubuntu/
zzupdate is an open source command line utility that makes the task of upgrading Ubuntu Desktop and Server to newer versions a tad bit easier by combining several update commands into one single command.
Upgrading an Ubuntu system to a newer release is not a herculean task. Either with the GUI or with a couple of commands, you can easily upgrade your system to the latest release.
On the other hand, zzupdate written by Gianluigi ‘Zane’ Zanettini handles clean, update, autoremove, version upgrade and composer self-update for your Ubuntu system with just a single command.
It cleans up the local cache, updates