Pros: 1) Sound file for North American pronunciation included in addition to BrE;
2) Sound file for example sentences included in addition to main entries;
3) Other strengths that the competitor(s) also tend to have.
Cons/Suggestions: 1)*** Import and export of favorite lists are not allowed (so the Oxford 3000TM list of important words and the Academic Word list cant be imported for study either);
2) Only one favorite list;
3) Unable to assign a value to each entry in a favorite list, say a value to indicate a users familiarity with the word;
4) Unable to sort a favorite list based on different characteristics and then moving forward/backward within the sorted list directly on the definition page of each entry.
Note: itd be very useful to integrate with other programs as well, such as Safari and iBook, so as to directly search for a words definition by typing on it, but guess this feature comes with too much technical difficulty.
Recommendation: buy if you just need it as a reference, but check carefully before purchase if you plan to use it as a learning tool for expansion or consolidation of your vocabulary.
English is my second language, but Ive been a business school faculty member in North America for many years since obtaining my Ph.D. here. If the developers could pay attention to my comments above, this dictionary can attract lots of more customers and generate significant benefits for both users and developers. Please bear in mind that ESL users and students are indeed the main customer base for this dictionary, and the suggestions above can help a great deal with meeting users learning needs. For example, students preparing for various English tests such as TOEFL/GMAT/GRE and middle school final exams can import their respective vocabulary lists to this dictionary, and then study the lists with the great content of this dictionary.
The content of this dictionary is simply remarkable. I first read it as a fresh college student, and literally loved it right away, regretting not having discovered it earlier. There was unspoken beauty in between the definitions and sample sentences of this dictionary, and often I simply enjoyed reading it page after page. Am excited to find this dictionary in app store, and trust it will help me brush up my vocabulary and deepen my understanding of English.
Ill give it 4 stars if a new version adopts my first suggestion on importing/exporting favorite lists, and 5 stars if two more suggestions are answered for. More importantly to developers, your revenues will increase sharply and exponentially if you act on all suggestions.