I attempted to connect the Eko Core to my Android Moto Z-Force2 about 30 times. I always got the spinning arrow. Called the tech support twice. The 2nd time I spoke to the Eko support the lady told me that my smart phone was not listed as a supported device. What! First that I had heard that. Why doesn't the purchase page/routine have a place where you enter your smart phone model and it tells you, "Go", "No-Go"? Also, I do not care about the Bluetooth function, but tech #1 said I needed to connect and use their app. This is a hammer. I want to hit a nail and that is all. I do not want these useless bells and whistles. I am sending this thing back and going back to a Littmann 3100.