Great for Beginners.
Learn Minor, Major, Augmented, Diminished, Suspended 2, Suspended 4, and all first and second inversions, on the 3rd, 4th, 5th, and 6th strings.
Includes a quiz mode, once you’ve mastered the chords.
Also check out Barre Chords for Beginners.
If you’ve mastered Barre Chords, Triads will give you more options to add complexity to your playing.