Good, but a bit misleading
I believe this is the Oxford Advanced Learners Dictionary in a slightly different package from the "official" one. In fact, when I bought it in an earlier version, thats the name it used, and it was slightly cheaper than the other OALD, which, in the absence of any other information on their differences, led me to choose this one. That is a decision I now regret.
Note that the base dictionary is a very good one, and I have few complaints about the software. Unfortunately, though, the pronunciations are all done through text-to-speech technology and are often wrong. I think the other app with the human voices is better. There is another thing that is arguably a problem, though one that it has in common with some other dictionary apps: there isnt any equivalent of browsing through the dictionary, the app showing you nothing until you launch a search.
Kumarick about
DioDict4 English Advanced Dict, v4.0.2