lymegrove BrainFlo Download

Notes that
connect themselves.

BrainFlo is a private notebook for iPhone, iPad and Mac. Write a thought, and it links to the ideas it belongs with, so your thinking grows into a map you can explore.

Download on the App Store Free for up to 100 notes
BrainFlo on a MacBook showing a grid of linked notes BrainFlo on iPhone showing the knowledge map

See the shape of your thinking.

The Knowledge Map lays out every note and every link as a living graph. Radial Focus puts one idea in the middle with everything related to it around the edge.

Knowledge map on iPhone

Search by meaning.

Search for “focus” and find your notes on deep work, flow and habits, even when the word never appears. BrainFlo understands what you mean, not just what you typed.

Search results for focus on iPhone

Every note knows its neighbors.

BrainFlo reads each note on your device and suggests the ones it relates to. Open a note to see its connections and follow the thread.

A note with its related notes

Catch a thought in seconds.

Type it, dictate it, scan text from a photo, or share into BrainFlo from any app. Bring an Obsidian vault, Markdown files or email with you.

Writing a new note on iPhone

Think it out on a whiteboard.

Arrange notes freely on an open canvas, then watch your knowledge grow in Analytics: your busiest topics, strongest links and the notes still waiting for a connection.

Whiteboard on iPad

Watch it work.

AI that stays
on your device.

Download an open-source language model and use it to summarize, expand and pull insights out of your notes. It runs entirely on your iPhone, iPad or Mac. Your notes are never sent to an AI service.

  • Llama 3.2Meta
  • Qwen2.5Alibaba
  • Gemma 2Google
  • Phi-3.5 miniMicrosoft
  • Mistral 7BMistral AI

Language models need a Mac with Apple silicon, or an iPhone or iPad with 8 GB of memory or more. Every device gets BrainFlo’s built-in summarizer.

Choosing a language model in BrainFlo

Not just another notes app.

BrainFlo is a knowledge graph that’s local-first, AI-powered and entirely yours.

FeatureBrainFloiXnoteObsidianRoamLogseq
Graph-First Interface✓✓–✕–
Semantic Search✓✕–✕✕
On-Device AI✓✕✕✕✕
Typed Relationships11 typesGenericPlugin✕Basic
Color-Coded Edges✓✕✕✕✕
Auto-Discover ConnectionsSynapse✕Plugin✕✕
Contradiction Detection✓✕✕✕✕
100% Local-First✓iCloud✓✕✓
PriceFree · Pro $4.99 once$40/yr$4/mo sync$180/yrFree
Native Apple (SwiftUI)✓✓ElectronWebWeb wrapper
Guided Note Creation✓✕✕✕✕
Text-to-Speech✓✕Plugin✕✕
Import (JSON / MD / TXT)✓CSV✓Limited✓
We Don’t Know You Exist✓iCloudTelemetry✕Analytics

Swipe the table to see every app.

✓ Built in – Plugin or limited ✕ Not available
The Barlow Code

Privacy isn’t a feature. It’s a declaration.

Named after John Perry Barlow’s A Declaration of the Independence of Cyberspace, The Barlow Code is BrainFlo’s founding principle: your knowledge belongs to you. Not to a platform. Not to an algorithm. Not to us.

  1. 01

    Local processing

    Embeddings, search, graph analysis and AI run on your device with Apple’s frameworks and on-device models. Your ideas never leave it to be understood.

  2. 02

    No tracking

    No analytics, no ads, no telemetry. The app only goes online to sync through your iCloud and to download an AI model when you ask for one.

  3. 03

    Your iCloud, not our servers

    Sync uses the private database in your own iCloud account. We run no server, so there’s nothing of yours for us to see.

  4. 04

    Total ownership

    Export, edit or delete everything. Export to Markdown or JSON at any time. You own every byte, and you always will.

We don’t even know you exist. That’s The Barlow Code.

Start your second brain.

BrainFlo is free for up to 100 notes. BrainFlo Pro is a one-time purchase of $4.99, with no subscription, and adds unlimited notes, the Synapse Engine, the Whiteboard, Smart Folders and Analytics.

Download on the App Store

For iPhone and iPad with iOS 17 or later, and Mac with macOS 14 or later.

Need a hand?

Questions, bug reports, feature ideas: send them our way and a real person will reply.

Prefer email? Write to support@lymegrove.com