Plainvoice and NaturalWrite
NaturalWrite asks you to paste a draft and press Humanize.
What Plainvoice does instead
You lock a fact, then read the original next to the rewrite. The locked wording stays as written, and the page shows the difference. Plainvoice does not promise that a rewrite will pass a detector.
Free is 1,000 words a month. Writer is $9 a month, or $6 a month billed annually. Studio is $19 a month, or $12 a month billed annually. Billing is not connected.