I purchased this app as 1 year premium user. But what I get is not very different from a free user except for more useless features as seeing who checked my profile, adding more learning languages. I think developer should change format for this app or add more useful feature, let native speakers correct the post's sentences one by one as Hi-Native app. Why? Because all users want to help but they are lazy to rewrite the whole text. Beside, it's hard for us not allowed to answer with a picture.