While this is pricey for an iPhone app, it is definitely a good deal compared to a real dictionary. I dont regret the money Ive spent on it.
Ive used this dictionary every day for the last month, in French class. I always beat classmates in looking up words, and so far it has only missed one word compared to the large classroom dictionary. It has all the pronunciation, word use and alternates you expect from a real dictionary, and is easy to read. Being able to quickly look up words or conjugations (and Google!) in the definitions themselves is also very handy.
The verb conjugation tool is excellent, and completely replaces my Bescherelle. Changing tenses is very easy.
The history list is very handy, particularly if you want to make up a vocabulary list later on.
There is a number translation tool, but frankly Ive never used it.
The only bug Ive found is when doing a search for a word. If you type in "rec" (in French » English), youll get a long list of possible words, but you cannot select any of the last few words. You can force the table to scroll upwards to see them, but the table snaps back with the words out of sight when you release. The only workaround is to narrow your search. I dont often have a problem with this, though.
Finally, one change Id like to see is an option to erase the entry field automatically when you go back to look up a new word. Now it takes two steps before looking up a new word: go back to the search screen; erase last word. Not a big deal, but when you are looking up several words in a row, it gets annoying, and the erase button is rather small so I often miss it. There is a back-arrow at the bottom that could take you back to the previous word if need be.
Overall, a great app that needs a few tweaks, and a lower price, to be fantastic.
Dan1867 about Collins-Robert Concise