With Transposing Helper, no more stress to check keys every time! *Use this app when · Original chords seems too difficult and want it to be arranged to your style. · You playing guitar, especially playing it with capo! (When Eb -> D, You can play guitar set capo in 1st) · you feel your song's tune is too high or too low Please turn smaller wheel and larger wheel until when original key and key to-be meets ex)When you want to change the key from A to C while chord progression is A, F#m, Bm, E7