I absolutely hate Apple's no refund policy on apps in their App Store. I've wasted $10 looking for an outlining app, basically trying to avoid spending $25 on OmniOutline. 

Google Inbox fonts look too large on the iPad Pro.

My Writing Workflow Wish List

I like drafting long-form articles in an outliner. An article might start in Little Outliner, but I want to be able to transfer the OPML file I create to the iPad for further editing, and then export that outline to an editor for final edits and publishing. I want to use markdown for the formatting. I can't use Little Outliner on my iPad because I cannot get to the Javascript console to switch the server location.