I use it all the time!
I literally use the app almost every day. I read a lot of newspapers, magazines, research material, and more. It seems like writers these days like to use obscure words to show how smart they are. Im an attorney that has practiced law for 25+ years and own my own law firm, so Im no slouch when it comes to vocabulary. Nonetheless, the app comes in VERY handy. I did pay a few dollars for an upgraded version, but it was well worth the money.
OMR LAW about
Dictionary.com Pro English