The Andriod app used a lot of the 3rd Edition dictionary, which is made obsolete by the 4th Edition (Legacy) and 5th Edition (canon) versions. I've found that it can be helpful in certain specific situations, such as finding rhyming words, but overall it's not worth tracking down another place to download it, if such a place even exists.

You can also download the 5th Edition dictionary in PDF form here in the thuum.org Library. This is the most up-to-date canon dictionary available other than the one here on the site, and it is printable if you desire to have a portable, physical copy.