This week Fraser and Federico look at two options for outlining on iOS.

Outlining is a powerful software technique that goes far beyond the bullet list in a word processor. Outliners let you create structured documents and - crucially - expand, collapse and restructure them at will.

If you haven't used an outliner before, we look at two options: one that gives you a stripped-down Markdown-style editing experience and one that lets you do, well, everything in one place.