In early 2020 I had a business trip to the Big Island and decided to make if a couple vacation. Back in 1987 recorded car tours were via cassette recording with the tour recording referring to mile posts and land marks like a gas station or McDonalds. I was delighted to see that the technology was so advance. The off line GPS works flawlessly. I have the Shaka App on both my phone and ipad and plug in my ipad and use the ipad for the tour. Paying, downloading and using is intuitive and easy. Plus they have support area with FAQs. I recently asked a basic question and they got back to me quickly.
So back in 2020, we took the Kohala Coast tour twice. Loved the information, tour and tips. We did North Jungle and Kona also. We bought the entire island of tours so we had max flexibility. In 2022, We visited Oahu on another Business/Leisure trip and again purchased the whole island tour. We took the Grand Island (Counter Clockwise) and North Shore (Clockwise) tours, as well as East Oahu. Great. We happened to purchase a day of tours at Kulaloa Ranch and the Shaka tours fit right in for the trip to the ranch and back.
Now that we have used the tours twice, Shaka Guide is without a doubt a must have when visiting Hawaii. They just added Utah so I couldn't resist purchasing the whole of Utah tours package and sampled a little of Zion already.
I hope this information helps. Big thumbs up to Shaka Guide!