About

A native humanizer
for what you write.

Humanizer is an AI text rewriter built the way Apple builds its own — SwiftUI on the device, paired across Mac and iPhone by Apple ID, Apple In-App Purchase for billing. No investor deck, no VC roadmap. One person reading the inbox.

Philosophy

Apple users notice details. The corner radius of a sheet, the curve of an animation, the way a button sinks under your finger. Cross-platform wrappers can't fake those details — they always feel off by a hair. So Humanizer is built natively, in SwiftUI, the way Apple builds its own apps. It's slower to make. It pays back forever.

A rewriter is not a paraphraser. Paraphrasers chew words and spit them back; a rewriter listens for cadence, contractions, the messy human rhythm that AI flattens. Humanizer is built around that distinction: the same Claude model behind the polished AI you're trying to disguise, prompted instead to undo its own tells.

Why humanize, why now

Schools, hiring managers, and clients are screening for AI text. Turnitin, GPTZero, Originality, Sapling — every submission goes through one of them. The market has answers: Quillbot, Hix, StealthGPT, Undetectable, Humbot. All web-only, all priced for SaaS budgets, all built for browser sessions instead of the way you actually write — in Notes, Mail, Pages, Safari. There is a real, narrow gap for a native Apple app that lives in the system surfaces you already use and never touches your data outside Apple's stack. Humanizer is built for that gap.

How Humanizer is built

SwiftUI on every device. Apple Sign In for auth, RevenueCat over Apple In-App Purchase for billing, Keychain for the bearer token. The rewrite runs through Anthropic's Claude; the detector score comes from Sapling. The backend is a Next.js project on Railway — Postgres + Drizzle for storage, App Store Server API for entitlement state. The Mac app adds a Services menu entry; iOS adds a Share Extension. An App Shortcut surfaces Humanize in Spotlight and Siri on both platforms. One Swift codebase across both platforms, no Electron, no React Native, no cross-platform compromise.

Get in touch

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