@purism something like F-Droid from Android so I can get all things exclusively free software and secure. Other than that, of course Telegram, KDE Connect, something like KDE KOrganizer, handy notes like ColorNote, and good program for typing documents. I also would love Orbots and GNU Icecat. I use such programs a lot.
@thibaultamartin @ademalsasa @purism Plasma Mobile and Ubuntu Touch already have that stuff: Kubes organizer and email client with kirigami, Flatpak support in Discover which uses kirigami (so it's adaptive), Teleports client from the UBT team.
UBT and Plasma Mobile are working closely together to get app compatibility going between the platforms. Right now i think it's mainly being held up by the outdated version of qt and other libraries in UBT's 16.04 base.