After reading the other reviews, I needed to clarify for new prospective users. This app is NOT a language learning software, (even though it has helps for that very thing!) My whole family moved into Russia without knowing the language, and I can say that without discovering Slovoed our language learning would be greatly hindered. It has become so essential to our family of 5 students that each computer and telephone is now considered first whether it will run Slovoed or not. Abby-Lingvo is a waste of time, while Slovoed is completely the best solution. This is not simply our opinion, as each of our language teachers in class have come to the point of waiting for us to look up new words in Slovoed rather than to use their Collins or Oxford dictionaries. In a rare few instances the definitions are not quite the best translation, but on the overwhelming majority it is spot-on. The red highlighted accent character is essentially helpful while at the same time being more than most, (or any?) dictionaries offer.
Con: the latest update does not run quite as fast on an IPhone 3gs as the last version did, but then it does have more functionality.
Not only is the premium version, (with audio), worth every dollar, but I do consider it absolutely essential for any person who finds themselves in complete immersion!