Multiple Apps running on the Sync 3 at once :
Android Auto
AA Mirror Link
OBD2AA
Torque Pro
It took a bit of unofficial rework to get it working and will also run Youtube via Android Auto (although Android Auto keep blocking it, so roll back to earlier version is required).
Gives gauges and Safety Camera Warnings.
The standard SatNav also has Safety Camera's, so it's quite noisy in the car when you approach them, with all sorts of warnings going off.