We've seen no shortage of syncing note apps for iOS, but Write keeps with the simplicity we like while packing in an enormous feature set. It also includes a free Mac app to quickly add notes from your menubar.
Write syncs with a folder of your choice in Dropbox so you can use any notes you create with other apps on other platforms easily. It packs in an insane number of features, but you can avoid them entirely if you just want a basic notes app.
It functions as a Markdown editor, provides font choices, secures your notes with a passcode, offers a free Mac app to let you quickly add notes from your menubar (although you can't edit existing notes, unfortunately), has a full-screen mode for fewer distractions and more space, quickly selects text with a dedicated fast-selection cursor, shows previews of notes with a long press and lots more. Just going through Write's settings shows you so much, like the enormous number of text-sharing options (with the ability to add custom ones too).
If you're not satisfied with existing Dropbox note-syncing apps on iOS, you should definitely give Write a try. While Elements has been at the top of my list for awhile, Write really gives it a run for its money. Check out the video above for a demonstration, or head on over to Write's official site for more information.