Great app for Yellowstone
Just like having a personal tour guide, the narrator pointed out key must see spots as well as some history and educational aspects.
Worked perfectly with gps only, As there is only limited cell service in the park.
Would give 5 stars with minor changes
1 make the location services required only in app
2 allow the map ( which is excellent) to join in tour mode
Great app though if you are visiting Yellowstone get this now
Slash111 about
Yellowstone GyPSy Guide Tour, v1.3