Syml

It has persistent, unlimited undo through an radial dial that makes Undo and Redo a fluid part of the editing experience
An interface that feels at home on the iPad Pro
All the fonts and themes that you need to make your writing environment look and feel exactly the way you want
Create markdown text version of a website via the share extension, with built in filters to focus on the content

It allows you to insert markdown interactively using simple swipes.
Deep markdown syntax awareness with beautiful highlighting and actions based on the current text
Fully optimised to take advantage of iOS 9 features like Multitasking, which allows you to use it in tandem with other apps, and Spotlight integration, so you can easily jump to your files
Pinch to expand selection, Tip-tap to move the cursor to the beginning or end of a word (hard to describe, but easy to master)

Inquisitive Software