I just discovered https://gitlab.gnome.org/Jehan/gimp-flathub-stats that tells you the download (including updates) stats for a given flathub application.
Ran it over the KDE applicatitions that are part of the release service that we have in flathub.
The results are somewhat surprising:
org.kde.kdenlive
Total: 22649 downloads in 8 days
org.kde.kalzium
Total: 16571 downloads in 9 days
org.kde.kgeography
Total: 16343 downloads in 9 days
org.kde.kbruch
Total: 15744 downloads in 9 days
org.kde.kapman
Total: 15473 downloads in 9 days
org.kde.kblocks
Total: 15426 downloads in 9 days
org.kde.katomic
Total: 15385 downloads in 9 days
org.kde.khangman
Total: 15370 downloads in 9 days
org.kde.kbounce
Total: 15280 downloads in 9 days
org.kde.kdiamond
Total: 15242 downloads in 9 days
org.kde.kwordquiz
Total: 15173 downloads in 9 days
org.kde.ksudoku
Total: 15155 downloads in 9 days
org.kde.kigo
Total: 15125 downloads in 9 days
org.kde.kgoldrunner
Total: 15062 downloads in 9 days
org.kde.knetwalk
Total: 15030 downloads in 9 days
org.kde.palapeli
Total: 14939 downloads in 9 days
org.kde.klickety
Total: 14917 downloads in 9 days
org.kde.klines
Total: 14866 downloads in 9 days
org.kde.knavalbattle
Total: 14848 downloads in 9 days
org.kde.kjumpingcube
Total: 14831 downloads in 9 days
org.kde.ksquares
Total: 14829 downloads in 9 days
org.kde.killbots
Total: 14772 downloads in 9 days
org.kde.kubrick
Total: 14696 downloads in 9 days
org.kde.ktuberling
Total: 14652 downloads in 9 days
org.kde.kontact
Total: 3728 downloads in 458 days
org.kde.kolourpaint
Total: 2542 downloads in 9 days
org.kde.okular
Total: 2304 downloads in 3 days
org.kde.kpat
Total: 1203 downloads in 8 days
org.kde.ktouch
Total: 880 downloads in 9 days
org.kde.kate
Total: 638 downloads in 9 days
org.kde.ark
Total: 571 downloads in 9 days
org.kde.dolphin
Total: 566 downloads in 3 days
org.kde.elisa
Total: 387 downloads in 3 days
org.kde.minuet
Total: 103 downloads in 9 days
org.kde.kwrite
Total: 84 downloads in 9 days
org.kde.kcachegrind
Total: 35 downloads in 9 days
org.kde.kcalc
Total: 23 downloads in 4 days
org.kde.lokalize
Total: 10 downloads in 3 days
kdenlive is the clear winner.
After that there's a compact block of games/edu apps that i think were/are part of the Endless default install and that shows, since after that the next app has like 6 times less downloads.
"New" (in the flathub sense) apps like lokalize or kcalc are the ones with less downloads, i guess people haven't seen them there yet.
