There are so many bugs with this app. If I start navigating before any audio service the audio service volume is very low. Once the navigation notifies me with an audio tone of a change of route or a missed turn then the audio service volume goes very high. Not to mention sometimes switching between apps bogged down the phone and forces me to restart it. I don't see how such a widespread app it's so buggy and unpolished. AA maybe more dangerous than handling your phone.