When comparing Xournal++ vs Supernotes, the Slant community recommends Xournal++ for most people. In the question“What are the best note taking apps for UNIX-like systems?” Xournal++ is ranked 15th while Supernotes is ranked 26th. The most important reason people chose Xournal++ is:
Fill shape functionality, shape drawing (line, arrow, circle, rect, spline), shape resizing and rotation.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Advanced PDF annotation tools
Fill shape functionality, shape drawing (line, arrow, circle, rect, spline), shape resizing and rotation.
Pro Supports pen input from devices such as Wacom tablets
Pro LaTeX support (requires a working LaTeX install)
Pro PDF, PNG export
PDF Export (with and without paper style);
PNG Export (with and without transparent background)
Pro Grid and rotation snapping
Pro SUPPORT
Pro Plugins using LUA scripting
Pro Audio recording and playback alongside with handwritten notes
Pro Short-form note-cards
The note-card format is incredibly versatile, and great when you have lots of information.
Pro Responsive platform
Works on all devices, from mobiles to laptops.
Pro Full Markdown (with LaTeX equation) support
Great to be able to use all the features of Markdown, rather than a select few.
Cons
Con Only web apps for now
The developers haven't released native apps yet.