This is a wonderful guide to touring the Big Island. It's easy to load onto your phone, then you choose whichever tour you want, and you are on your way. Very easy to use, stop where you want, get our for a walk, hike, lunch, whatever, then start again. They give some history as well as descriptions of out of the way things to see and do. There's some lovely Hawaiian music in between when you are in between stops. I highly recommend it. You can do one tour or as many as you want. We were there 2 weeks and did all 5. We plan to buy their guides for the other islands. I give it my highest rating possible !