I personally like this one, It has all notes to tune. The best part about this app, is that you can tune an individual instrument instead of detecting a note or something like that. Im not a guitarist but I do play bass and it has all notes to tune to. The down part of it is that the drop C tuning does not have its own individual one so you have to select it all the way In the top. But overall a great app for a bass player or a guitar player beginner or a experienced player
Xcupxxcake about Fine Tuner - Chromatic Tuner, v1.7.1