I havent checked other German-English dictionaries, so I cant tell if this is the best or if there are better ones available. As for this one, it is good
Pros:
Decent coverage of everyday phrases.
Search after 3 characters in both languages is very useful and convenient
Price is OK
Cons:
When I was checking out the app extension I found a typo "standart" in the welcome screen. That does not give my high confidence in the spelling accuracy.
Way too much focus on British English provided that the are approx. 6 times more Americans around.
Recommendation: get a native American speaker involved in a version 2.0
Robert in Silicon Valley about German Dictionary, Nifty Words, v1.50