When comparing Gitit vs Bear, the Slant community recommends Bear for most people. In the question“What is the best cross-platform note-taking app?” Bear is ranked 34th while Gitit is ranked 36th. The most important reason people chose Bear is:
Well-designed app.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Lots of export formats
Giti has a multitude of formats that it allows to be exported, including LaTeX, ConTeXt, DocBook, RTF, OpenOffice ODT, and MediaWiki markup.
Pro Supports markdown
Getit supports markdown, a plain text formatting syntax that is designed so that it can be read by HTML.
Pro Free and open source software (FOSS)
Licensed under GPLv2 so you can download source code and customize to meet your needs, provided that you know or are willing to learn Haskell.

Pro Can be used collaboratively by multiple people

Pro Renders math
Using MathJax.
Pro Beautiful interface
Well-designed app.
Pro Easy to use
Pro Instant markdown preview in the editor while preserving original MD code
Pro Easy tagging
For example: #tag/sub tag/foo/bar #tag2/foo/bar
Pro Flawless sync
It's everything Dropbox Paper promised to be, but without the embarrassment. The notes are always in sync between devices.
Pro Lots of export formats
PDF, RTF, DOCX, HTML, TXT and MD.
Pro Hashtag support
Adding a hashtag with a keyword tags the note to make it easy to search.
Pro Simple to back up/export entire note database
Notes are exported as plain text, not a proprietary format, along with all embedded objects.
Cons
Con Requires Haskell
On some Linux platforms a binary package for Haskell may not be included in the standard repositories. So, it will be necessary to compile Haskell from source code or find a non-standard package repository, which may seem like a hassle if you don't use Haskell for anything else.
Con Only subscription-based
Can not buy it straight up.
Con No Tabs - can only view 1 note at a time
Con No inline editing and markup of pictures
The only option is to open in an editor (thereby creating a copy) and saving it again.
Con Sometimes there are sync problems between iOS and macOS
