PDF Pals is a native macOS application that allows users to chat with their PDF documents using AI. It supports multiple AI model providers, including OpenAI, Azure OpenAI Service, and OpenRouter. The app processes documents locally on the user's Mac, ensuring data privacy and security. It features a powerful OCR engine for scanned PDFs and complex forms, and stores all data locally in a SQLite database. There is no file size limit for documents. Users can interact with multiple PDFs simultaneously, ask questions, and extract information. The app is available for macOS Ventura 13+ and offers a free trial with a paid perpetual license.