Its a good app, but needs a couple other features

This app is great for learning how the notes on the staff translate to the fretboard, but it only shows you a single note at a time. For it to really be effective as a sight reading tutor, it should have multiple note problems (and possibly even take rhythm into account as well). The functionality and design of the app is great though, so if you just need to learn the basics, it works.

SixStringFool about Guitar Sight Reading Trainer