Squint is a desktop app for Windows and Linux that lets users press a hotkey, drag a selection box around any area of their screen, and receive an AI-generated explanation beside it instantly. It connects to OpenAI's API to process the captured region without requiring users to switch apps, open a chat window, or upload files manually. Squint supports follow-up questions, multiple capture regions, streamed responses with markdown formatting, and local chat history. It offers a free plan with limited daily captures and a paid Plus plan with monthly credits for heavier use.