Since the latest update, it introduces new words and phrases in the review section without having gone over them before. The hearts are a terrible idea. I'm here to learn a language, not play games. I realize it's supposed to incline me to pay you but it has the opposite effect. Update. It's much worse now. It will only accept one gender for nouns and often the sentence structure in their answer is wrong according to the rules they taught before. Feels like they don't listen to the feedback.