Superfluous "app" layer in routes of Conference App

I’ve been playing around with the conference app to get my head around combining tabs and the side menu and I have a question about the routing.

The four main tabs (schedule, speakers, map, & about) are all under the “tabs” level of the URL hierarchy, but they are also under an “app” level. Does this level serve a purpose?

Could all the routing be adjusted from ‘/app/tabs/schedule’ to ‘/tabs/schedule’?

I’ve been playing around with it here, but would like to know if I’m missing anything.