Bizarre choice of words for word of the day – Portuguese Dictionary + Review

An example: today's word is "vertex". How many people learning Portuguese need to know how to say "vertex"? Yes for a comprehensive dictionary that's great but for a word that pops up on my iPhone everyday that's more of a hindrance. There must be some Einstein who can program the app do that it only give us one of the 500 or 1000 most common words as word of the day. Also I agree with many of the other reviews. It needs Portuguese pronunciation.
Review by Edson do Nascimento on Portuguese Dictionary +.