Yes. Dash runs in the background, so even if you're using your screen for mapping, we'll still log and score your trip.
It's also possible to have your phone or tablet streaming music to your car's stereo, even if you're using a Bluetooth-based OBD-II adapter - the Bluetooth protocol allows for pairing with multiple devices, so enjoy your tunes!
One word of caution: if you use your phone while driving, do it safely! And keep in mind that texting while driving is a no-no in many places (and is not very safe anywhere!)