Good news: you can view realtime data from many of your car's sensors, right in Dash.
Just swipe right to left from the Dash driving screen and you'll see a view that includes readouts from many sensors in your vehicle. What you'll see will vary from car to car, because not all cars support all sensors, but you'll almost always see instantaneous fuel economy, RPM and engine temperature. If your car tells us how much gas is left in the tank, we'll calculate your remaining range.
You can also customize which sensors you see as well as their order - just go to Dash Settings and look for the "Driving Gauges" sub-menu; it's in "Advanced Settings" on Android.