I am an intermediate guitar player and I find this app very useful. The developer responds within an hour or so to all my email questions and requests for changes to the app and is genuinely interested in fixing any problems. The folks writing the negative reviews--and several reviews contained good points--really should send him an email to discuss the changes. I did it and hes already submitted a update based on my idea to Apple for release. Btw, I am not affiliated with the developer. Im just giving an honest review based on my experience.
dpukala about Guitar Sight Reading Trainer