There's one really compelling app, Tesla Waze, at https://teslawaze.azurewebsites.net/. It uses open maps, uses your car's gps location (after asking permission in the browser), and it overlaps waze, traffic, accidents, weather maps, tolls, many other things to give you a super incredible much more useful traffic map. I start it up and use it instead of the built in cool google maps based tesla navigation system.

Also, they block all video and sounds, you can't watch youtube while you are driving or even stopped. They recently added netflix when you are supercharging only.