

Update: it turns out that the list is for graphics/imaging applications as opposed to GUI apps.

Click install, and choose to open the file using Gnome Software. Meanwhile, per this tweet, the most downloaded Flatpak apps via Flathub are: Using Gnome Software: Head to the Spotify page on Flathub. The Snap list includes a lot of popular cross-platform programs with Spotify and Slack topping out the list but also some other big names in there like Discord and Android Studio. The list of popular applications is quite different between these app sandboxing/distribution means. Now there's a similar list out of the folks maintaining Flathub for Flatpak packages. At the end of 2018, Canonical's Alan Pope shared the most popular Snap packages for 2018. Although the Spotify Linux app is no longer under active development it still receives a few fixes now and then and it is still a far spurious better alternative to the Flash-based Spotify web player.
