The Kala Ukulele app is a chords only version of this. It also includes videos showing how to play each section, and it plays accompaniment into your headphone

The Kala Ukulele app is a chords only version of this. It also includes videos showing how to play each section, and it plays accompaniment into your headphones as you play along. I found it super helpful, and I believe it's based on technology originally developed for teaching guitar. Not sure if it's open for programming your own songs in or not, and much of the library is behind a paywall.