Company Ullrich Vormbrock created these great apps:
Simple Guitar Tuner - Free Chromatic Tuner for Acoustic and Electric Guitar, Bass, Ukulele !, Simple Guitar Tuner Pro - The Chromatic Tuner for Acoustic and Electric Guitar, Bass, Ukulele !, Simple Bass Tuner Pro - Free Chromatic Tuner for all kinds of Bass Guitars, Simple Ukulele Tuner Pro - Free Chromatic Tuner for all kinds of Ukulele, Rookie's Canned Laughter - Happiness for Free!, Chromatic Simple Ukulele Tuner, Simple Chromatic Guitar Tuner, Simple Banjo Tuner, Simple Mandolin Tuner, Simple Balalaika Tuner - Precise Chromatic Tuner, Fine Violin Tuner - Precise and Chromatic, Chromatic Instrument Tuner, HZ, and others..
