Submind is a private, AI-powered note-taking and knowledge-management app that allows users to capture ideas, record thoughts, and organize content across voice, text, images, PDFs, videos, web links, and more. It offers live transcription of voice recordings (including real-time transcription), multilingual support (36+ languages), a rich text/Markdown editor with checklists, nested items, and color-coded folders, and a powerful search experience across all content. The built-in AI enables users to chat with their media, ask questions about videos, audio clips, YouTube links, PDFs, or images, and receive summaries and insights in seconds. Content can be exported in multiple formats (PDF, DOCX, Markdown, TXT, image) so you can share or archive your ideas easily. Notes and media remain on the device unless you choose to use AI features, and cloud storage is not mandatory.