Outliner by Alfred Fritz vs Zavala

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.

Zavala is a free, open-source outliner for arranging information in related hierarchical rows. Its outlines support note taking, task lists, brainstorming, project planning, project management, and documentation. The app works offline and can sync through iCloud, which requires iCloud Drive setup; outlines can also be shared through iCloud for real-time collaboration with other Zavala users. It imports and exports OPML, Markdown, and HTML, can print outlines, and lists PDF among its export formats. A share extension downloads a web page and attempts to convert it into an editable outline, with results depending on that page’s structure. Apple Shortcuts actions support creating, finding, editing, exporting, and manipulating outlines and rows. Locked outlines encrypt rows and images on disk and during iCloud sync with AES-GCM and a 256-bit key, but titles, tags, and some metadata are not encrypted. Zavala runs on macOS, iOS, and iPadOS; current listings require version 26 or later.