When comparing Keynote vs Supernotes, the Slant community recommends Keynote for most people. In the question“What are the best Microsoft OneNote alternatives?” Keynote is ranked 7th while Supernotes is ranked 11th. The most important reason people chose Keynote is:
Can import all kinds of assets (images, videos, PDFs, sounds) into mockup without hassle.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Imports nearly every type of asset
Can import all kinds of assets (images, videos, PDFs, sounds) into mockup without hassle.
Pro Animations and transitions
Keynote currently is one of the very few tools that supports animation of elements and transition of views without programming.
Pro Text Styles makes it easy to create typography systems
Pro Smart Snaps
Keynote has alignment grids (aka snap to grid feature) that snaps to end, midpoints, baselines etc of objects and grids. They are super useful when you want to follow a structured layout for your wireframe.
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 available on Mac and it's file are not compatible with Microsoft Windows
Con Only web apps for now
The developers haven't released native apps yet.