Ulysses III vs MacDown

A few themes are baked in and a big selection of user-contributed styles to choose from are available on the Ulysses Style Exchange.

Ulysses has a clean, unobtrusive, easy to overview interface that allows focusing on writing. By default it's split up in 3 panes with sidebar, sheet pane and content pane from left to right. Unnecessary panes can be hidden.

Markdown formatting can be applied from the right-click menu, with keyboard shortcuts or from an optional markup bar. Necessary elemants to links, images, and footnotes are added by filling in a popover.

Pasted rich text and imported Word documents keep their formatting when converted to Markdown.

Attachments such as images, text notes, keywords and writing goals can be added to content. And to organize them keywords can be added.

Ulysses saves everything in the app so there's no file management outside of the editor involved. It organizes content in groups (folders) and sheets (files), has a powerful, easy to use search and allows adding keywords to attachments to help them be organized and found quickly.

Groups can have an unlimited amount of subgroups and the title of subgroup shows up in the pane view. Sheets can be split up, merged, glued together and easily moved around in the sheet pane by dragging and dropping. Great for splitting up larger documents into manageable chunks while still keeping an overview of the whole project and having the ability to move sections around quickly.

Contents of a group can be filtered by text, keywords or change date within headings, code blocks, images or any other marked up text. Filters can contain a combination of conditions and be saved to make a new group. Saved filters can be moved around to different groups and will return filtered results for that group. Selecting multiple groups will show the combined sheets of those groups.

You can operate Ulysses via keyboard only. No need for mouse.

The editor can export to Plain Text, RTF, Word, HTML, ePub and PDF with customizable styles for each option. It can also preview HTML directly in the browser.

There's no live-preview pane or an external previewer necessary. Ulysses displays styling inline.

Ulysses has options for highlighting current line, showing line numbers and enabling typewriter mode. Typewriter mode defines a place on the screen where the cursor should be so eyes are kept focusing in one place on the screen.

Content can be synchronised across devices via Apple's iCloud.

Ulysses comes with an excellently written documentation that covers everything there is to know about the software, including an extensive list of keyboard shortcuts as well as short and sweet introduction to Markdown and its benefits.

Ulysses is available for both macOS and iOS. This, combined with the cloud syncing allows users to work on their projects using any Apple device they have at the time.

The editor tracks statistics that shows how many characters, words, sentences, paragraphs, and pages a document contains and estimated reading time for slow, average, and fast readers. The statistics display in a popover that can be torn-off so it's constantly visible.

Goals such as how many characters, words, sentences, paragraphs, lines or pages should be written can be set to help get motivated.

Groups, tagging, and notes for each document.

Staff is helpful in answering questions on how to use the app.

A time (10hrs) and usage limited demo for Ulysses III is available.

MacDown is a free and open source editor influenced by Mou. It's released under the MIT license.

MacDown's main view is split into two panels. The user types on the left and the Markdown is rendered on the fly in the right panel. This helps users to better understand the way they are formatting their document.

You can use a CSS file to customize the rendered output and the file preview you are working on will display the rendered Markdown with the custom CSS styling on top.

MacDown has syntax highlighting support for various languages when writing code in fenced code blocks.

MacDown has a good built-in auto-completion engine for Markdown symbols.

Using MacDown for the notorious README.md use case gets you going without reading any manual or requiring any configuration values. Think of it as a sort of TextEdit for MarkDown files. Thus its shortcomings - neither powerful nor versatile - turn out to be a PRO for novices trying to jump on the MarkDown bandwagon. Open its help and you'll immediately find yourself editing the MacDown's MarkDown help file, a MarkDown primer with some MacDown menus and configuration added.

Unlike a few other editors, MacDown lets you link between markdown pages.

This is especially useful for Markdown novices