Download or use the web app

Either of them

Download the desktop application

Use the following packages to install the desktop application on your computer: https://github.com/alexcorvi/apexo/releases

You usually won't have to update as a new release comes out, since the desktop application will automatically grab the latest version from the web application.

Use the web application

The desktop application is in fact just a wrapper around the web application, so you can use the web application without downloading anything! The web application is also a progressive web app (PWA) which means that it can also run offline.