If you're heading to Google I/O 2014 later this month, you need this app. It has the schedule, it has a map of where everything will be, it lets you build your own schedule, see what people are talking about on Google+ (naturally), and even watch videos from previous I/O events. Google I/O 2014 is even good for those that won't be heading to San Francisco, with the option to set things up for your remote viewing of presentations.
The layout is very clean and with a tile-style layout ann clear controls. You can filter sessions by broad themes (design, develop, or distribute) or more specific topics like accessibility, Polymer, and wearables. You can even check out the multi-level map to see which I/O session is in which room right now.
So if you're doing Google I/O 2014, either in person or from your computer at home, the Google I/O 2014 app is an app you need — and it's free on Google Play.