When comparing Haroopad vs Joplin, the Slant community recommends Haroopad for most people. In the question“What are the best open source Markdown editors for UNIX-like systems?” Haroopad is ranked 3rd while Joplin is ranked 17th. The most important reason people chose Haroopad is:
Haroopad has multiple available themes to choose from and new ones can be easily built with CSS.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Very customizable
Haroopad has multiple available themes to choose from and new ones can be easily built with CSS.
Pro Multiplatform support
Runs on Mac, Windows and Linux with 32-bit and 64-bit binary packages available.
Pro Completely free
Haroopad is a free and open source Markdown Editor.
Pro Various publishing and export options
Haroopad can publish to Wordpress, Evernote, Tumblr and MediaWiki and export to EPub, ReStructured Text, RTF and PDF.
Pro Mathematical expressions support
Haroopad supports mathematical expressions through LaTeX and MathJax.
Pro Supports MathJax
Mathematical equations can be exported to the browser by using MathJax, a JavaScript display engine with a lot of great features such as typography support and modular output.
Pro Allows embedding content from a wide variety of sources
Content from YouTube, Twitter, Vimeo, Slideshare, Flickr, Instagram, Soundcloud, Wikipedia and Pastebin can be embedded in the document.
Pro The Markdown flavor can be extended
Haroopad supports GitHub Markdown flavor out of the box. But the functionality can be extended to support additional Markdown features.
Pro Vi key bindings
For people used ti vi/vim, Haroopad can be set up to be used with vi keybindings.
Pro Dual License
GPL3 license is applied to the current version and will be applied in the future to meet the internal dual licensing scheme.
Commercial use follows Apache license v2 (APLv2) for keeping the GPL license and non-commercial use under consideration.
Pro Offline access
Pro Open source
Peace of mind that there is no malicious piece of software in the app.
Pro Encryption
Pro Cross-platform
Supports Windows, Mac, Linux, Android and iOS.
Pro Supports file attachments
Pro Supports markdown
Pro Supports tags for notes
Pro Web Clipper
Browser extension saves full pages, clean content, or screen selections to new notes.
Pro Optional CLI interface
Provides a CLI interface for terminal lovers.

Pro Supports multiple languages
English, French, and Spanish, Italian, German, Czech and many others.
Pro Active user forum with support from app creators
Support, troubleshooting, and new feature requests are easy to make at the user forum and you can contact the app creator directly.
Pro Dropbox support
Can sync using Dropbox.
Pro Nextcloud support
Pro Timed alarm reminder for to-do lists
Cons
Con English translation is iffy
The software was initially developed in Korean for Korean users and later translated and ported to English. The translation to English has not been perfect and there may be some weird expressions and grammatical errors along the way.
Con Documentation is in Korean
The official documentation is in Korean, so it may be a bit hard for non-Korean speakers to find their way around Haroopad.
Con Windows installer does not support easy admin installation
It can't request the necessary privileges to install to C:\Program Files.
Con Undo sometimes loses control about the selection
Select some text, select a formatting in the Markdown Syntax Helper view, undo.
Con Code pane is dark in default theme
Can be hard to read and a bit hard to find where to change it.
Con Sync issues with Android
If update on Linux then sync on Android, sometimes the Android sync will duplicate or remove some journal notes. Seems to be a bug in the Android app. The Linux app alone without sync with Android seems to work well using Dropbox. But don't expect changes you make on Android to sync properly back to Linux.
Con Sync issue under Linux
The Linux client has a bug that requires the user to click the mouse frequently in order for sync to proceed. This bug has been open for a while.
Con Gargantuan memory footprint
1GB+ of memory for taking notes.
Con Old school interface
Con Bloated
This project is suffering from feature creep and uses a lot of memory for a note-taking app.
Con App Image launches very slowly
On Linux, you can only install via App Image, which take 5+ seconds to launch. I can launch LibreOffice in under two seconds.
Con Sync issues on Windows
No way to change account settings and sync easily corrupted.
Con Weak tag searching
Joplin can currently only search for a single tag at a time. None of the boolean operators (AND, OR, NOT) are available for use in searches. This greatly diminishes the usefulness of tags in Joplin.
Con Can't create tags from the mobile app
