My “personal computing” extends to at least one Android device, so it is worth noting how I use such devices.
Now that I’ve got LineageOS as the base, I install F-Droid, and install and configure select applications. 
Oh, I actually configure F-Droid! But it is mainly to not use a “data connection” (meaning mobile SIM) to update, ever.
Looking at my Pixel XL, which apps do I need?
- barcode scanner (I rarely need it, but always do)
- Conversations (XMPP)
- …
And probably a different web browser…
I think I might start this from scratch, and not load a bunch of these until I reach for them, and then assess.
Oh, but definitely syncthing-android!