Best German dictionary there is. Conjugations, plural, gender are all present and very usable. Most words come with example sentences.
Feature wise, I can only nitpick that the favorite list can use a different sorting option. There is no pronunciation, but once you learn a bit of German, its not a problem really.
Having said that, it has happened to me twice that the app would crash on startup. I had to reinstall to get around the problem. If this is solved, this app would be an easy 5 star.
Update:
There is one other serious performance bug. If you have many favorites (more than 200), the speed & responsiveness of the app become an unbearable drag. Since any serious learner would have many favorites, this is unacceptable. Im lowering the raring to 3 stars until this is resolved.