After using the excellent Larousse French-English Dictionary I purchased this Spanish-English Dictionary with high expectations. Sadly this is a poorly conceived app with almost none of the functionality of its French cousin. To make matters worse I immediately encountered a technical glitch when the audio feature did not function. Repeated re-downloading of the app did not solve the problem.
As for features, I will cite two examples, but there are others. In the French edition you can highlight a word in a definition (whether in French or English) and that word will appear on its own page, complete with its own definitions and synonyms. Thus if you do a search on the English word "work" you will see many French words AND phrases meaning or related to "work". Highlight any one of those French words or phrases and you will be taken to a page featuring that word or phrase. Once there the audio function will give you an accurate pronunciation of the word or phrase. I use this feature extensively. No such luck with the Spanish edition.
Also, there is no bookmarks feature in my download feature. History, yes. Bookmarks, no.
More sadly there doesnt seem to be an easy way to get a refund. Buyer beware. ONE star at best.