I'm not too familiar with the "store" or the things you can "purchase". I got the Dutch progress test, thinking it meant I can always go back and check out my progress. I did a few questions to check it out, realized it was way too advanced for me and quit, thinking I can go back and take it again later. Nope. Not a big deal, but I wish I could've known it was a one off test and not an added feature.