I have the Hummingbird Fish Smart app on my phone….the HD maps are awesome and I can utilize the depth shading the only downside is that it is 10 to 20 dollars a map, and also limited map options. I really like hummingbird and their products…. I just wanted to see if there was a product out there that would perform like the Ice helix 7 as far as mapping unit without the sonar. I appreciate the feedback!