I enjoy the visual flow of chords with the music though the chords it shows are the basic ones and not the nuanced ones like sus-chords, so youd have to tweak for that. Also, I was disappointed it couldnt find any song I could find, say, on YouTube and doesnt compensate by allowing you to upload mp3s (although I believe the desktop version, which costs something, does). Yet what should I expect for free, everything?
TheRealJim about Riffstation - Guitar Chords, v1.13