I've tried the self hosted version. What kind of app on android should one use? I think there's supposed to be chandler and I either did not find the app in play store or it did not work. It has been many months since I tried that though.
The app which let's you browse the internet? Type in the address of your server and you should be presented with Monica. Works quite well on mobile.
Ah. Memory served me well, although it got the timeline wrong: https://github.com/monicahq/chandler
It has been deprecated
App is needed to avoid copypasta and inconveniences