This is a free app to learn arpeggios on a guitar neck. Click on the note to play it. It has arpeggios for standard and some drop tunings.

It has a right-handed and left-handed mode.

An arpeggio is a type of "broken chord" where the notes that compose a chord are played or sung in a rising or descending order. Arpeggios create a fast, flowing sound. Arpeggios always sound good over their matching chord in a progression, therefore, they generally form the melodic home bases and safe notes for improvising guitarists.