Outliner by Alfred Fritz vs TreeLine

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.

TreeLine is a free, offline information organizer for Linux, Windows, and macOS. It stores records in a tree, with fields on each node acting like a small database. Fields can contain plain or rich text, HTML, numbers, dates, times, booleans, and URLs. One file can hold several node types, each with its own fields and formatting. Search commands find node data, while filters present matching nodes in a flat view. Node output can appear on screen, be printed, or be exported to HTML. Files use JSON and may be compressed or encrypted automatically. Import and export cover plain text, delimited tables, older TreeLine files, Mozilla and XBEL bookmarks, generic XML, and ODF text outlines. Additional exports include CSV, PDF, tab-indented text, and TreeLine format. Windows installers target Windows 10 and 11. Linux installation requires Python 3.9 or newer, Qt 6.4 or newer, and PyQt 6.4 or newer. macOS is not formally supported; a third-party MacPorts version is suggested. The free plan is free under GNU GPL v2 or later.