Its good.
It has an ad at the beginning (full screen) and then takes you to the app. If you hit the top button (where it plays all the notes in order) it has a pop-up ad. There is a ad at the bottom as well. It is easy to use. You press the note and it play that note for you to tune your guitar with. Its not horrible, but its not the best, but its free. I thank the developer for a free way to tune my guitar.
Bmxer appdude about
Guitar Tuner·