Marginally useful for rhymes

The thesaurus part is okay. The "in app purchase" of the rhymes component is a waste, for numerous reasons. Examples-- The word "know" rhymes with "how" and "now" according to these guys. Really? Is that because "ow" are the last two letters? And forget it if you want to find a two syllable word that is a rhyme for any one syllable word. No one home for that...

So, If youre an author, or write research reports, etc., probably a helpful app. If youre a songwriter, not so much.

Firstboomer814 about Thesaurus Rex by Dictionary.com