I thought it's a great app for learning languages. But higher level I accomplish more errors I occur. I'm learning German by the way. In German Language we all know that we have put verb at the second place and subject can be put at the third place when we put adj/adv/some kind of phrase at the first place. But in this app we cannot follow this rule and we have to put Sub at the exact place as sample answers. That's the first error I want to refer. There are more.