Zettel

Zettel is a local note‑taking application for iPhone and Mac that emphasizes a single‑note, full‑screen editing experience. It stores each entry as a plain Markdown file, allowing users to write with familiar formatting while keeping the data portable and editable outside the app. Organization is achieved through a hashtag system, where tags prefixed with “#” can be added directly in the text to group related notes.

The interface offers light, dark, and system‑aligned theme options, and it operates without external services, keeping all content on the device. Compatibility requires iOS 26 or later on iPhone and macOS 26+ on Mac, and the app is distributed free of charge via the App Store.

Developers can build the project from source using the provided scripts, which configure Xcode settings with Apple Developer credentials and produce builds for either iOS or macOS. Contribution guidelines are available in the repository, encouraging community involvement in its continued development.