I haven't used this but free is free.
Writing. Automated Dropbox/iCloud Syncing. Markdown. Fastest Sharing. Beautiful Design. Love.
NOTE: iCloud sync between iOS and Mac version of Write is currently broken. I have no definite date on a fix for this. Dropbox sync should be working just fine.
"Write Looks Like The Future Of iOS Text Editors" - Cult of Mac
"Write Packs a Ton of Note Taking, Sharing, and Syncing Features into an Incredibly Simple Interface" - Lifehacker
"Write is a fantastic text editing app. So good, in fact, that it has replaced the other apps I've been using." - Mac World
"Write for Dropbox is a near perfect way to jot down notes on your iPhone" - The Next Web
"A worthy option to check out if you are in the market for your “holy grail” text editor" - App Advice
Last updated 17 July 2014.