Recently there have been some updates from Microsoft in regards to the Field Service Mobile App
The 10 entity limit that used to give consultants headaches has now (as in right now) been lifted.
Now lets not get to silly any entities that you add must be related to Field Service, so you cant go adding Leads/Opps to the solution or there will be a knuckle rapping for it. This is a huge bonus that will help enhance the mobile capabilities very rapidly.
With V8 of Field Service also comes an upgrade to the app which will give additional functionality.