Interval Error Dangerous for Beginners – Music Minds: Flashcards with Calvin & Zoey Review

This app would be wonderful, but there is a pretty serious error. They say that the interval C to E in the bass clef is a fourth when it should be a third. This is the only error I've found so far, but I've only had it for 15 min. Start checking your answers and I'll bump you up to 4-5 stars.
Review by JessWP on Music Minds: Flashcards with Calvin & Zoey.