@tante
#hupf's #shoppinglist:
https://codeberg.org/hupf/shoppinglist-xdc

this #shopplinglist is a #webxdc app so it runs inside #deltachat or #cheogram.

you can self-host #chatmail or #xmpp server for those chat apps, and thereby self-host the app running inside them.

#deltachat allows pinning apps to your launcher on #android.