Lots of good things about this app but definitely room for improvement. At the higher levels of the app you are just thrown into the translations without any pre-learning of the new phrase. This makes it VERY frustrating and makes the lesson take much longer than it should. Also, when reviewing sections there seems to be a lot of new phrases or variations of words that were learned. Again, this makes the review frustrating and difficult to complete. Lastly, for common phrases that have a specific gender (when learning Spanish), it would be helpful to have a better explanation as to why an answer was wrong rather than simply a red wrong answer pop-up. Other than that the app is awesome and has REALLY helped me achieve my goals of learning a new language.
BigSexyBubba about Duolingo Learn Many Languages for Free, v5.0.14