Supernotes

Supernotes organizes notes as modular cards rather than long documents or files, letting cards be nested to form parent-child hierarchies and linked bi-directionally to build a networked knowledge base. Real-time collaboration lets friends or teammates edit cards together and see each other's cursors, while a calendar heatmap view helps visualize note activity over time. The app supports Markdown and LaTeX and can export cards to Markdown, JSON, or PNG.

The free Starter plan gives access to nearly all features with a starting limit of 100 cards that can be expanded through referrals and achievements. The paid Unlimited plan removes the card limit and adds AI-assisted proofreading and organization, full API access, and priority support, with discounted long-term 4-year licenses and student pricing available.