used to be a fantastic website. now atrocious. they got rid of several learning modes, but what's even worse is that 'learn mode' which was the most useful mode to me, now only lets you do 6 rounds (which is not a lot) until it locks you out of learn for that set and forces you to pay for Quizlet plus to continue using it. this is the same with the test mode. ridiculous. there are also several bugs. however so far the app seems to be unaffected, but the website needs to be fixed.