OpenCat

OpenCat is a native ChatGPT client for macOS, iOS, and iPadOS that embeds AI into every corner of your Apple workflow. It supports multiple AI models—including local models, API keys, cloud subscriptions, and Apple Intelligence—letting you switch providers seamlessly. Designed for power users, it offers a keyboard extension for using AI in any app, Siri integration, voice chat, text-to-image generation, image-based chat, and system-wide translation. The app also includes Markdown rendering, LaTeX formulas, and a prompt library. OpenCat follows a freemium model: a free tier with basic features, a one-time Pro purchase ($9.99) unlocking the keyboard extension, iCloud sync, Siri integration, and team joining, plus a Cloud AI subscription ($2.99/month or $19.99/year) that adds GPT access, voice chat, vision, and text-to-image. Its deep Apple ecosystem integration—especially the keyboard extension—sets it apart from web-only chatbots, while local model support appeals to privacy-conscious users. Key features include Voice Chat for hands-free conversations, Text to Image to generate images from prompts, Image Chat for visual dialogue, and System-wide Translation for instant text translation. The keyboard extension lets you invoke AI in any macOS app—Messages, Notes, Mail—without switching windows. OpenCat's core differentiator is its native integration with the Apple ecosystem. Unlike web-based alternatives (ChatGPT web, Poe), it offers a seamless, OS-level experience with keyboard shortcuts, Siri Shortcuts, and iCloud sync. For privacy-focused users, running local models avoids sending data to third-party servers.