Capture everything, connect ideas with backlinks, and actually find them again — a knowledge base for your whole life.
A second brain that grows with you. Capture notes, links, and ideas; connect them with backlinks; and rely on search and AI to resurface exactly what you need, whenever you need it.
Backlinks and mentions weave notes into a personal knowledge graph.
Full-text search resurfaces any note, idea, or link in seconds.
AI answers questions grounded in everything you’ve captured.
Turn key notes into spaced-repetition flashcards.
A journal makes capturing fleeting thoughts effortless.
Track books, ideas, places, and projects as filterable databases.
It’s a trusted external system where you capture and connect everything you learn, so you can offload memory and resurface ideas on demand. Arythmatic Notes is built for exactly that.
Yes. Pages can link to and mention each other, building a connected graph of your knowledge.
Yes. Arythmatic Notes works in any browser and installs as an app on your devices — always in sync, with recent pages readable offline.
Free to start, no credit card required. Bring your team when you're ready.
Free forever for individuals · No credit card required