TypeBoost

TypeBoost is a macOS-native AI writing assistant that lets you turn your own prompts into reusable, context-aware writing tools. Instead of switching between apps or copying and pasting into a browser, TypeBoost runs system-wide so you can invoke AI directly where you write—whether that’s email, notes, documents, or web apps. Its primary purpose is to make AI-assisted writing faster and more consistent, while keeping you in control of tone, style, and content.

With TypeBoost, you can define custom AI actions that operate on selected text, such as rewriting for clarity, adjusting tone, summarizing, expanding, translating, or generating alternatives. These actions are saved as your personal toolkit and can be triggered via keyboard shortcuts or a simple menu, working seamlessly across any macOS application. The tool respects your existing workflow, layering on top of it rather than forcing you into a new editor. Because it is prompt-based and customizable, it adapts to your specific writing patterns, guidelines, and domain knowledge.