Leo Editor vs Outliner by Alfred Fritz

Leo Editor is a free, open-source programmable editor, outliner, and knowledge base for arranging code, writing, and research in flexible outlines. It runs on Windows, macOS, Linux, through an API, and as self-hosted software. Cloned nodes allow one idea to appear in several outline locations while remaining synchronized. Navigation includes expanding and collapsing, hoisting, promoting, clones, and clickable links, with backlinks available for related sections. Users can automate workflows with Python scripts, commands, and plugins. Outlines export to HTML, MORE, Markdown, Org mode, reStructuredText, and Vim outline formats. Jupyter integration lets @jupytext nodes represent notebook cells and save changes back to .ipynb files. The leoBridge module exposes Leo content to Python host programs. A WebSocket server accepts JSON queries and changes, using password challenge-response authentication; TLS is optional. Leo requires Python 3.9 or later and is distributed under the MIT license.

Outliner by Alfred Fritz is an Android app for organizing shopping lists, tasks, to-do items, ideas, memos, and small projects in collapsible outlines. Each outline can contain unlimited titled activities with notes, due dates, and completion status. You can switch among tree, to-do, due-date, and hashtag-grouped views, although some views require PRO. Activities can be reordered and indented; PRO adds subtree cut, copy, paste, sorting, sharing, full-text search, and formatted notes with bold, italic, font color, and font size. Synchronization options include Google Tasks and Dropbox, with Treeline and OPML options documented in the tutorial. Imports include CSV, Natara Bonsai, Treepad HJT, Treeline TRLN, OPML, and plain text; PRO adds exports such as HTML. The free version has no ads and no sync. PRO requires the separate Outliner Pro Key app. Android is the listed platform, including phones, tablets, and Chromebooks.