Good, but could use a couple more features

It would be even better if the mobile version included the lesson grammar rules that exist on the website. Right now Ill start a lesson, but have no idea what or why the correct answer is what it is until I go to the website and learn the grammar rules. Those are just too important to skip over.

Second, I wish there was an option to use only typed responses instead of selecting the words in the boxes on the bottom. Sure, when Im using my phone I prefer the boxes because its too cumbersome to have to type it all out, but when on my iPad I actually prefer to type it all out. I find its more challenging to have to remember the right words instead of being presented with a short list of words. Consequently, I feel I learn faster when having to type it all out. (Also, they capitalize the first word in the sentence so you almost always know what the first word should be. I try my best not to look for this but its hard to ignore once you notice it.)

OmegaMeme about Duolingo Learn Many Languages for Free, v5.1.5