Very useful and important app
In this day and age of Internet communication its very easy to lose sight of the importance of using more than a handful of words, especially when so many of them are being overused (and in some cases abused).
To me the M-W app is essential, if for no other reason than the "word of the day".
Its easy to use which means its easy to upgrade ones vocabulary.
Island Night about
Merriam-Webster Dictionary+, v4.0.1