Great App!!!

The Oxford Dictionary got into the App-Store and admittedly I like it more than the printed version, because of one simple thing:
You can get Vocabulary faster and therefore its easier!
And now Id like to ask one question to the developer (If you read this):
The English language expands with approx. 25000 word a year, are they updated frequently and (of course) for free?
Or do I have to pay every time, when you update the app with new Vocabulary?
But despite the question mentioned above, the app is top 10 on my student-iPhone.
Just the best dictionary app I have.

Pascal.app about Oxford Advanced Learner’s Dictionary, v1.0