Flomo is a minimalist two-person notes app from China inspired by the Zettelkasten method, offering a simple text box and tagging system with no folders or ads. The app has accumulated over 100 million stored notes, and in 2024 its founders acquired the outliner app Mubu from ByteDance's Feishu office suite. The company succeeds by selling a writing habit rather than features, maintaining privacy through a subscription model, and building trust through transparent product thinking.