https://github.com/e14n/pump.io/wiki/User-Guide (everyone's welcome to help extend it)
And since his account is on identi.ca, these are some notes for people who knew it when it was still StatusNet-based (otherwise they couldn't have an account there now): https://identi.ca/jankusanagi/note/IpfiW7kBQYuXt6H7odMzQQ
JanKusanagi @i at 2014-11-24T18:03:11Z
Iván Ruvalcaba likes this.
“@email@example.com logged into identica (earlier) via firefox on the pc. Logs in fine, presented with a nice web interface. Trouble is I can not provide any input via the web interface, not like, not comment, I get an error even when clicking log out. ('An error occurred' is the message on log out). Andstatus works fine. #heyho”
Anyway, there are Pump.io applications for the desktop, too. I recommend you take a look at those.
Also, check out the other clients for Android. From what I've seen, AndStatus support if very poor and confusing.