When comparing Scrivener 2 vs Byword, the Slant community recommends Byword for most people. In the question“What is the best iOS writing software for novelists?” Byword is ranked 2nd while Scrivener 2 is ranked 4th.
Specs
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Pros
Pro Built-in research management tools
Allows keeping all research material and notes of a project, including web links, pdf files, image files, multimedia, etc.
Pro Outline and Corkboard Views
Pro Multiple project templates to choose from
Pro Massively customisable export options
Pro Word count support
Pro A dark theme is available
Pro Can publish directly to external services
Pro Can export to html, pdf, rtf
In addition to plaintext, Byword can export to HTML, PDF, RTF.
Pro Exemplary Markdown support
Byword de-emphasizes the syntax itself, while emphasizing its effects. It appropriately adds style, like italic and bold, to text that's designated by markdown and dims the syntax so it does not getting in the way of comprehension. Additionally, there are commonly used hotkeys (⌘b, ⌘i, etc) that can be used to apply style without having to know the syntax or having to type it out each time.
Pro Includes features that speed up writing
For example, while authoring a bulleted list hitting return automatically prepares a new bulleted line.
Pro Available for all Apple devices
Byword is available on a Mac, an iPhone and an iPad.
Pro Syncs using iCloud and Dropbox
Documents can be synced using iCloud or Dropbox from within the editor for use across all devices.