Synapse is your transmedia pulse. Connect the dots between books, streaming, and personal thoughts - uncover hidden links and see culture differently.
Free - and always will be.
Notes, links and sources in one calm dashboard.
See how every idea you capture connects.
Books, films and ideas you're thinking about.
Surfaces links between notes you didn't notice.
True intelligence isn't a walking encyclopedia of isolated facts -
it's the web you weave between them.
Neuroscientists have found that highly creative and intelligent minds show high semantic connectivity. When they think of a concept, it doesn't activate one isolated node - it fires a massive, sprawling network of distant memories, analogies, and associations.
They see the link because their neural pathways are deeply interconnected. Synapse is built on this same principle - giving every reader a tool that thinks the way brilliant minds do.
Features
[[Note title]] to link ideas instantly. Synapse builds the connections for you - no manual wiring required.Ideas in the Wild
A single piece of media can open a door to an entire constellation of ideas. Here's how watching Arrival sparked a real chain of thought - across books, research, and personal reflection. Hover any node to follow the thread.
AI-Powered
Linking ideas manually is itself an act of thinking - it forces you to understand why two concepts belong together. But some of the most powerful connections live between notes you wrote months apart, from books you read in different seasons of life. A Synapse AI Agent reads your entire knowledge base and surfaces the links your conscious mind skipped.
Runs privately on-device: Apple Intelligence on iPhone 15 Pro and later, Gemini on other devices.