Electric, acoustic, you name it ... an app that they can use with all of their instruments. And while some guitar tuner apps offer chromatic tuning, others will only give you the basic, six ...

"Stay Put" Clip For Acoustic, Electric and Bass, and Violin Display Rotates 360 Degrees (works for right or left-hand players) Tuner can be used on front of back of headstock, Rotates 360 Degree ...