This automatic tuner just takes seconds to accurately tune any string based musical instrument! - Yanko Design
Fine Chromatic Tuner Pro – Alkalmazások a Google Playen
KLIQ MetroPitch - Metronome Tuner for All Instruments - with Guitar, Bass, Violin, Ukulele, and Chromatic Tuning Modes - Tone Generator - Carrying Pouch Included, Red - Walmart.com