Too bad the functionality is still in the Neolithic. Seriously, no way to unsubscribe?!? You think it's ok to use this business model? I don't think so. Whatever you comment, will not make the customers happy. Additionally, your product lacks a productive, accumulative process of learning, therefore, I can't recommend it to my clients learning English. 1/5 The idea is great, but you just want to milk people globally, let's be real.