What? - AI Rewriter

About this app

What? is an AI writing assistant powered by Claude. Paste any text, pick an action, get a polished result — in seconds, without leaving the app. -------------------------------------- 14 BUILT-IN WRITING ACTIONS -------------------------------------- Fix Grammar · Rephrase · Make Professional · Make Casual · Shorten · Expand · Simplify · Translate (20 languages) · Humanize · Improve Flow · Make Punchy · Remove Hedging · More Assertive · Analyze Tone Humanize strips AI tells — em-dashes, "delve," "leverage," "tapestry," "robust" — and rewrites with contractions, fragments, and varied rhythm so your text reads like a real person wrote it. Pro subscribers get Claude Sonnet. The most capable model for nuanced edits. -------------------------------------- 16 FREE ACTION PACKS — 160 SPECIALTY ACTIONS -------------------------------------- Every pack is free and included. No purchases, no paywalls, no limits. Writer's Pack — vivid imagery, stronger openings, cliché removal, active voice Lawyer's Pack — legal precision, plain English, protective hedging, demand letters Marketer's Pack — headlines, A/B variants, CTAs, SEO, ad copy Email Pack — match reply tone, cold emails, subject lines, TL;DR, follow-ups Student Pack — academic tone, paraphrase, thesis, counterargument, study notes Dating Pack — confident openers, banter, bio glow-up, let them down kindly Recovery Pack — apologies, de-escalation, boundaries, make peace Comedy Pack — stand-up style, dry wit, dark humor, roast, absurdist Funny Pack — universal humor, dad jokes, meme-ready, one-liners, captions International Pack — Japanese business, German direct, French polite, match any culture Social Pack — tweet-ify, LinkedIn, Instagram captions, TikTok hooks, threads Coach's Pack — reflective listening, reframe, SMART goals, hard feedback Customer Support Pack — empathize, calm angry customers, explain policy, close tickets Sales & Negotiation Pack — handle objections, follow up, close, counter-offer Job Hunt Pack — resume bullets, cover letters, STAR answers, salary negotiation Product & UX Writing Pack — microcopy, error messages, push notifications, button labels MATCH ANY CULTURAL CONTEXT Pick a country — Japan, Germany, France, Brazil, India, and 20 more — and the International Pack adapts your text to that culture's communication style without translating a word. -------------------------------------- WORKS EVERYWHERE -------------------------------------- Keyboard Extension — fix or rephrase in any app from your keyboard Share Extension — select text anywhere, tap Share → What? to process it instantly Home-Screen Widget — one tap from your home screen iCloud Sync — history and settings stay in sync across all your devices -------------------------------------- BYOK — BRING YOUR OWN KEY -------------------------------------- Have an Anthropic API key? Use it directly. All Claude models, custom prompts, no monthly caps from us — you pay Anthropic per request. Your key lives in the iOS Keychain and never leaves your device. -------------------------------------- SUBSCRIPTION -------------------------------------- · 3-day free trial — no credit card upfront · Pro — Claude Sonnet, Writing Coach mode, Before/After diff view, tone meter · BYOK — your own Anthropic key, unlimited requests, custom-built actions Payment is charged to your Apple ID at confirmation. Subscription renews automatically. Cancel anytime in Settings → Apple ID → Subscriptions. Privacy Policy: https://sylvainlafrance.com/what/privacy Terms of Use: https://sylvainlafrance.com/what/terms

Bug fixes and under-the-hood improvements for a smoother experience.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

1. First observed Sep 1, 2026 · 1:32 PM Free