Type AI - The AI Keyboard vs Writer's brew

Type AI (formerly GPTKey) is an iOS keyboard extension that drafts tweets, captions, emails, texts, notes, and essays inside any app. You pick a writing prompt on the custom keyboard, and the extension returns an inline AI response without leaving Messages, Mail, or your notes app.

Most mobile writing assistants live in a separate app you copy from. Type AI installs as a system keyboard, so generation happens where you are already typing. A companion app lets you build custom prompts, review history, and copy outputs to paste elsewhere.

The press kit lists developer Gavin King and requires iOS 16 or later. New users get initial prompts free, then buy prompt packs or unlock unlimited prompts through in-app purchases to cover model compute costs while keeping the app ad-free.

It fits iPhone users who draft social posts, messages, and short-form writing on the go and want ChatGPT-style generation from the keyboard rather than a standalone chat window.

Writer's brew is a macOS writing assistant that rewrites, summarizes, translates, and replies to text you highlight in any app. It runs from the menu bar, a Spotlight-style popup, or keyboard shortcuts, and includes snippets, 15+ text utilities, and OCR that pulls words from images before sending them to AI. You bring your own OpenAI API key, so usage costs go to OpenAI rather than a monthly SaaS bill.

Most writing assistants live inside one browser tab or web editor. Writer's brew works system-wide on macOS 15.0 or later, which suits people who jump between Notes, email, Slack, and docs all day. The trade-off is it is Mac-only, requires your own OpenAI key, and skips the managed cloud workflow that all-in-one web tools provide.

Product managers, founders, and students who draft in multiple native Mac apps are the core audience. Power users pair it with Raycast or PopClip extensions for one-click rewrites, while snippet forms with placeholders like {date} and {clipboard} handle repetitive replies.