ChatGPT shortcuts for every app on your Mac, paid once.
PaletteBrain is a ChatGPT overlay tool. A macOS command palette that applies ChatGPT actions to selected text in any app or website, using your own OpenAI or Azure key and custom shortcut-bound prompts, sold as a one-time $29 license with no recurring app fee.
PaletteBrain is a macOS utility that puts a ChatGPT command palette on top of every application and website on your machine, triggered with the Option plus Space keyboard shortcut. Selected text is sent to the AI model as context, and the reply can be pasted straight back into the app you were working in with Command plus Shift plus Return. The point is to remove the copy, switch window, paste, copy, switch back loop that normally comes with using a chat assistant alongside real work in Notion, Google Docs, Slack, Discord, Gmail or any other Mac app. Beyond the default actions (fix grammar and spelling, translate to English, summarize to bullet points, convert to blog post), the app lets you build custom commands in seconds. Each command carries its own prompt and model settings, including a creativity control, and can be bound to a keyboard shortcut so a repeated writing, coding or rewriting task becomes one keystroke. A separate palette shortcut opens the command library, and conversations are stored in a dashboard you can clear permanently. PaletteBrain does not resell model access. Users connect their own OpenAI key, and the homepage also describes running models through Microsoft Azure OpenAI for faster infrastructure or experimental models. The developer positions this as privacy between the computer and the chosen provider, and as a cost play: the comparison table sets the $29 lifetime license plus an average base OpenAI cost of under $2 a month against separate subscriptions for Grammarly Pro, DeepL, Raycast Pro, Jasper, ChatGPT Plus and Notion AI. It suits founders, writers, marketers, developers and support staff who already live inside a handful of Mac apps and want AI inline rather than in another browser tab. The tradeoffs are real: macOS only, no web or mobile client, no bundled model credits, and a one-time price the vendor says will move to an annual $99 model in a later roadmap phase.
One-time lifetime license at $29 for the macOS app, with no recurring app subscription. Model usage is billed separately by OpenAI (or Azure) on your own key; the site estimates an average base OpenAI cost below $2 per month. The vendor states the price will change to $99 per year instead of lifetime as the roadmap advances.
Learn moreWorks with any macOS app or website, with Notion, Google Docs, Slack, Discord and Gmail named as examples. Model access comes through your own OpenAI API key or Microsoft Azure OpenAI, swapped in the app settings.
Command palette (Option plus Space) that applies AI actions to highlighted text in any Mac app or website, with a shortcut to paste the last reply back. Built-in commands cover grammar fixes, translation to English, bullet summaries and blog post conversion, and you can create custom commands with your own prompt, model choice and creativity level, each bindable to a shortcut. Includes a conversation dashboard with permanent deletion and support for OpenAI or Microsoft Azure OpenAI keys.
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