It's incorrect English in many places. Right on the landing page, for instance: Replace them with a real live preview feature to help you concentrate the conte

It's incorrect English in many places. Right on the landing page, for instance: Replace them with a real live preview feature to help you concentrate the content itself If you don't know what's missing from that sentence [hint: it's a missing preposition], you are probably not a native English speaker. There are numerous other examples. It's important that apps like this have good English copy.