You take out front page add in magazine... – Guitar Tunes™ Review

... and your app doesn't at all work. What a waste of your advertising money. (See December 2016 issue of Guitar magazine, 4th ad from opening the magazine.) I'm starting to think that your app is a phishing scam. Be careful people. If it turns out that this is actually a functional application, and does what the screenshots show, then you should fire your whole design team. Their work on the initial experience after downloading the app was a waste of time and money. The experience will put off 9 out of 10 of your potential customers.
Review by J4nz0 on Guitar Tunes™.