Hello,
my idea is to add in the mobile app a point to point offline GPS navigation from the nearest public transportation stops, from a landmark or from the nearest point of interest to the listing for incoming guests.
The idea is that when I'm abroad , out of my city, without internet data connections, and I need to reach the listing I booked, should be very nice to have a big help from the mobile app that could show me the best way to reach the apartment I choose to stay.
These directions should be added by host.
I'm normally send to guests some directions to reach the listing using airbnb messages but a GPS offline navigation should be much easier.