Notebooks is a backup and sync application for iOS and MacOS devices. It allows users to store and access files across multiple devices. It offers an intuitive interface that allows users to create and manage documents and notebooks, with the ability to share and sync them with other devices. It also provides support for cloud-based storage, making it easier to access your documents from different locations. Additionally, Notebooks offers a variety of features, such as spell-checking, text formatting, and image editing, that can help users create professional-looking documents. Finally, the app provides a secure and private environment to store and access information, helping users keep their data safe.
The only one that, as a folder tree structure, is infinitely foldable like notebooks.