Mem is an AI-native note-taking app that eliminates the need to manually organise your notes into folders by intelligently surfacing relevant past notes as you write new ones. Its AI can answer questions about the contents of your entire note library, functioning like a personal knowledge base you can query conversationally. Mem is popular with researchers, writers, and knowledge workers who capture a lot of information and want a system that makes retrieval effortless without requiring strict organisational discipline.