EO> Also, for the type of app you're describing, I think the BBS server 
 EO> software would likely need to specially support that, too.  Some BBS 
 EO> software (such as Synchronet) has a built-in NNTP server, which may work 
 EO> with an app like that, but NNTP is probably not an optimal protocol for 
 EO> that purpose.

This is very true.  It would require something like a custom web service and
a custom app specifically designed to use it which may not be worth the
effort...

Just like you said, software like Synchronet (and Mystic) can already access
many parts of a BBS on mobile and tablets using the various servers.

Message bases can be accessed via NNTP clients on iOS and Android.  I know a
few people who travel that use this method exclusively to keep up with their
message bases while on the go, using Mystic's NNTP server (or Mystic and
JAMNNTPD).

The same could be said about using POP3/SMTP for private BBS specific mail, and
FTP for file bases.  All of which Mystic, and I think Synchonet and a couple
others can do.

Given the limited real estate on a mobile device, I can't imagine the existing
NNTP client apps would have an interface much different than what a custom
application would have... just a little lack of cohesion between it all.

I think some BBSes in China create their own custom mobile applications for
accessing their specific BBS.

--- Mystic BBS v1.12 A14 (Windows)