As it is I didn’t find it at all difficult to find the answers to your questions by going to the “about page”.
Like the person you replied to (I assume), I clicked on the home page, pondered why one would not describe the app's purpose on the home page, failed to scroll horizontally with a mouse and closed the page before noticing the about section.
They didn't even lose me with the original link I couldn't make sense of.
> About Phosh
> The Phosh project aims to provide a daily-usable, robust and easy to use graphical user environment for mobile devices running mainline Linux. The name is a portmanteau of phone and shell as phosh was one of the first components developed by the project. It hence coined the whole project’s name and is still one of its core components. All of Phosh is entirely Free Software.