Now on iOS & Android

Where thinking
becomes a map

Synapse turns your notes into a living knowledge web. Link ideas across books, thoughts, and media - discover hidden connections, and think more clearly.

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Synapse
6
Notes
4
Links
3
Sources
Open Graph View
Explore your knowledge connections
Your Library
All
Sapiens. De animales a dioses
Yuval Noah Harari
2 notes
BOOK
Armas, gérmenes y acero
Jared Diamond
2 notes
BOOK
Eden
Ron Howard
2 notes
MOVIE
Home
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Synapse
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Everything at a glance

Notes, links and sources in one calm dashboard.

Knowledge graph

See how every idea you capture connects.

Your library

Books, films and ideas you're thinking about.

AI Synapse

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.

Semantic connectivity Associative thinking Neural networks Knowledge graphs

Features

Everything your reading notes deserve

Visual Knowledge Graph
Watch your ideas come to life in a force-directed graph. Tap any node to explore connections you didn't know existed between your notes.
Wikilink Connections
Type [[Note title]] to link ideas instantly. Synapse builds the connections for you - no manual wiring required.
Timeline
A chronological view of your Bitácora and Journey. Every note and reading session in order, so you can see how your thinking unfolded.
Instant Search
Real-time search across all your notes, with highlighted matches. Find the idea you half-remember in under a second.
Private by Default
Your notes live locally on your device. Nothing leaves without your permission - no accounts required to get started.
Export Anywhere
Your knowledge, your format. Export your full graph as JSON whenever you want - no lock-in, ever.

Ideas in the Wild

One film. Three books.
A personal breakthrough.

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. Move your cursor over the graph.

Movie
Book
Note
Personal thought
01 - The spark
Watching Arrival
The film's premise - that the language you speak shapes how you perceive time itself - won't let go. I open Synapse and capture the thought as a note.
[[Language shapes reality]]
02 - The connection
Thinking Fast & Slow lights up
The wikilink fires. A note I'd taken on the Sapir-Whorf Hypothesis connects - Kahneman describes how framing and language alter the very choices we make.
[[Sapir-Whorf Hypothesis]]
03 - The insight
A personal thought emerges
Three sources - a film, two books, and a physics essay - all point to the same idea. I add a personal reflection and the graph makes the pattern impossible to miss.
[[Reframing changes outcomes]]

How it works

From reading to insight in three steps

1
Add a book and take notes
Create a note for any idea that strikes you while reading. Assign it to a book and optional chapter to keep things organized.
2
Link ideas with [[wikilinks]]
Mention another note by wrapping its title in double brackets. Synapse detects these references and builds edges in your graph automatically.
e.g. [[Identity-based habits]]
3
Explore the graph
Open Graph View to see your entire knowledge network. Pan, zoom, tap nodes to reveal previews, and double-tap to dive deep into any idea.

AI-Powered

You craft the web.
AI shows you what you missed.

Coming soon

Connections you craft.
Connections you never saw coming.

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.

Suggested connections
The agent scans across all your notes - books, films, thoughts - and proposes links with an explanation of why they belong together.
Reasoning, not just a link
Every suggestion includes a "Because:" - a short explanation grounded in your own notes, not generic AI filler.
You stay in control
Accept a suggestion to add it to your graph. Dismiss it if it doesn't resonate. The AI is your co-pilot - the connections are always yours.
AI Suggestion
Sapir-Whorf Hypothesis
📚 Thinking Fast & Slow
links
to
Identity-based habits
📚 Atomic Habits
Because: Both explore how internal framing and the language we use about ourselves quietly shape our long-term behavior and identity.
AI Suggestion
Language shapes reality
🎬 Arrival - personal note
links
to
The Order of Time
📚 Carlo Rovelli
Because: Arrival's heptapod language is directly inspired by Rovelli's physics - your notes on each were written six months apart but share the same core insight on perceived time.
AI Suggestion
Reframing changes outcomes
💭 Personal thought
links
to
The Creative Act
📚 Rick Rubin
Because: Rubin argues that the artist's job is to change the frame, not the subject. Your personal reflection lands on the same insight from a different angle.