Very helpful AND educational

Love this app. Not only does it let you know what is coming up BEFORE you get there but also lets you know what you will see so you can decide if you want to stop and hints on parking.
Another nice feature is that it gives you approximate driving time to the next destination to help you plan.
A REALLY GREAT feature is that it has very educational segments that help you understand many different things from park history, wildlife habits, how geysers are formed, the role various weather plays etc.
DEFINITELY worth the money.

TooOldForThis Crud about Yellowstone GyPSy Guide Tour, v1.2