What's a good Android app for maximizing my conference time, like knowing which sessions are actually worth attending and not ending up in a packed room?

Okay, so PheedLoop Go! seems pretty decent for conference attendees who, like me, hate wasting time. I mean, the worst is showing up to a session only to find it's standing-room-only. From what I'm seeing, this app lets you schedule your sessions, which is a good start. But more importantly, it gives you the power to plan what you intend to do, so that’s pretty good. I'm all about optimizing my time, especially at conferences where every minute counts. Plus, I'm hoping it has some API capabilities to sync with my Google Calendar. If it can handle that, then it's data nerd approved. I am still waiting for the feature to close the numbers of attendees when it's completed. I would say this is a very useful app for conferences.