Apps similar to garret include Scrivener. It's paid, but novelWriter is free. Other options are yWriter. In total there are three Novel Authoring Tools like garret for Mac, Windows, Linux, Android and iPhone.
Tailored for extensive writing, this tool offers flexible structure and organization, integrates project outlines, supports various formats, and allows reorganization through drag and drop, ensuring research materials are within reach for efficient work.
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novelWriter is a Markdown-like text editor designed for writing novels and larger projects of many smaller plain text documents. It uses its own flavor of Markdown that supports a meta data syntax for comments, synopsis and cross-referencing between files.
yWriter is a writing tool that uses "scenes" as a unit of text and allows you to associate that text with all manner of story elements (characters, locations, items) as well as place it and rearrange it within the context of chapters.
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