Word tuning

An app that allows us to highlight a few words or a sentence and then click a button to get suggestions for better word placement. There is an app called Wordtuner, through Microsoft, that works pretty well. When I write a sentence that I feel doesn't flow the right way sometimes I'm blocked from finding another word to use because I'm too focused or maybe placing a couple words in another order that makes my sentence express my thoughts better for the novel as a whole. It would be great to have something like that here!