I saw this posted on LinkedIn. As someone who makes a pretty good living off of writing, all I can say is, "No. Just don't. Not if you really want to be a good writer." I wouldn't give a nickle for most of these products, and some are actually quite destructive.
Buy yourself a standard HS grammar textbook and Strunk and White's. Bust your ass studying them--live in them. And then read good writers as much as you can. And when you aren't busting your ass studying and reading, write. That is the only way.
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The product you get by using some of these tools is called "typing." It is just clacking on a keyboard. No one should dare call "writing."