Found a shape that sounds good but do not know what it is called? Tap the frets you are holding, string by string, and the chord finder names it straight away. It works the other way too: pick the notes you hear or want, choose the lowest one, and it tells you which chord they make.
Most shapes have more than one correct name. A minor seventh and a major sixth share the same four notes (Am7 is C6 with A in the bass), and a chord with another note in the bass can be an inversion or a slash chord. The finder lists every name, best first, with the reason for each: root position, 1st, 2nd or 3rd inversion, or a bass note from outside the chord. It also gives the other ways people write each chord (Cmaj7, CM7, CΔ7) and both spellings when a root has two (C# and Db).
It knows all 84 chord types in the chord library, from plain triads to thirteenths and altered jazz chords, and it says which note is the root, the third, the fifth and so on, spelled the right way for that chord. It even tells you when a common note is missing, such as a seventh chord with no fifth.
Change the tuning in Advanced (drop D, DADGAD, half-step down, open G, D or E, drop C), tap Strum to hear the shape in your chosen guitar sound, and jump to the chord library for more ways to play the same chord.