Jeff Layman wrote:

The main problem is the dearth of good Usenet client apps for Android (I
have no idea if there are any for iphones or ipads).

I am using newstap in an iPad. As far as I can tell it is the /only/ nntp
client for ios. The developer is approachable and friendly, but it lacks
things like ability to add rot13 when sending, and any sensible killfile
system. .sig handling is not there.