Pay by rewritten words — not by washing the whole draft.

Whole-document “humanizers” bill like laundry. If only three paragraphs are highlighted on an AI-writing report, billing the entire thesis is the wrong unit.

HumanPen targets flagged spans from Turnitin / iThenticate-style reports, keeps citations and numbers stable where possible, and charges for rewritten words.

Free rounds apply to still-flagged spans after recheck under the product’s under-20% workflow. That is hygiene for iterative editing—not a claim that any institution will accept a badge.

Try the loop at https://humanpen.net.