Grammar fixes are free.
Everything else is $39, once.

Fixing spelling and grammar is free, forever, in every app. MacWriteBuddy Pro unlocks everything else (clearer, shorter, friendlier, formal, translate, bullet points, Summarize, Improve prompt, your own actions, and memory) for a single payment of $39, down from $79 at launch. No subscription and no account. Local models are free to run; if you choose a cloud provider, it bills your own API key at its usual rates, and we never add a markup or see the bill.

Buy Pro from the pricing section or from the app (Settings › License). Your license key arrives by email; paste it into Settings › License and click Activate. About once a day the app checks the key with our license server, which only ever sees the key, a random id for your Mac, its name, and the app and macOS versions. Never your writing.

No. There is no login and no account. Download the app, open it, and press your shortcut. If you buy Pro, the only thing we need is the email your license key goes to.

Memory is a short list of things MacWriteBuddy knows about you: facts like your name and role, how you like your writing, and words to always spell exactly. It’s stored only on your Mac, in ~/Library/Application Support/MacWriteBuddy, and never synced or uploaded. Add, pin, or clear memories in Settings › Memory, or type “remember …” in quick actions. If you turn on “Learn from fixes I replace”, sentences you fix are kept too, as examples of your voice.