I was hesitant to criticize a free app. Until recently I would have rated it a 4 or 5, but in it's present form, it is just the fact that I cannot attend physical classes at this time that keeps me from deleting it. The company has arbitrarily forced its users into a tournament system where one can't progress without hearts. It bombards users with advertising and exhortations to move up the leagues, etc. Now the app is glitchy: answers won't enter, sound doesn't work. Ruined the app. Why?