Official PS app for Android turned out to be pretty, but completely useless 3 Mb piece of code.
Well, not so COMPLETELY, you can check out your trophies, friends’ PSN status and read some news, blog feeds or games’ descriptions. The problem is, all this activity is really pointless, because why on earth would anyone do this on the phone? Trophies and PSN is available through console itself or at the relative web page, as well as all info and blogs are out there to fulfill all your needs.
Unfortunately, it is also buggy and unintuitive. In Android OS you’re used to see some options, when you press the menu button, but PS app thinks it’s better to go back. And if you want to sort your friendlist someway, like having them ordered at least by online/offline status, you just can’t do it. Well, anyway, it is better than existing substitutes.