Local-first · Private by design

Your second brain,
living on your own computer.

Feed it your chats, email, documents, recordings and screenshots as you go. It reads everything, remembers everything, and connects what you'd never connect yourself — and none of it ever leaves your machine.

Download for desktop See what it finds
Reads your chats in real time Answers with page numbers Finds things for you daily Data never leaves your computer

Everything becomes memory

Chats · Email · Books · Audio · Video · Screenshots — it takes it all

Every piece you feed it gets read, understood and linked — entirely on your own computer. Not one word is uploaded.

Chats · liveWeChat syncs in real time, and WhatsApp imports in one click from WhatsApp Desktop — no file copying, no keys to transcribe. Who promised what, who's waiting on you, every number quoted: all remembered.
Email · full importBring in your entire Gmail / IMAP history at once. Search it, question it, never dig through threads again.
Books & documentsPDF, EPUB, Word, PowerPoint — swallowed whole. Answers come back with the page number, ready to jump to.
Audio & videoMeeting recordings, podcasts and videos are transcribed automatically. Not a sentence gets lost.
Your everyday chat, looking ordinary
Could you send me the project proposal by Wednesday?
Sure — you'll have it before Wednesday.
Our park has a 2,000 m² warehouse opening up next month. Know anyone who'd rent it?
By the way — when are we playing that badminton game we agreed on?
Second Brain
analyzes live
What your brain digs out — pure gold
Promise radarYou promised the proposal by Wednesday — tracked, with a reminder before the deadline.
Lead matchingHe has a 2,000 m² warehouse to rent — matches another contact of yours who's been looking for storage. Introduce them.
Favor ledgerThat badminton promise has sat quiet for 12 days — a natural opener is drafted for you.
Relation cardThis contact is warming up over 3 months. Cares most about delivery dates. Landmine: don't stand him up.

All of this was already sitting in your chat history, unmined. Your messages are a gold mine nobody's digging.

It doesn't just store — it works for you

Three engines, watching every day

PeopleA living AI dossier for every contact: who they are, where things stand, what they promised, where the landmines are. A 10-second briefing before any meeting.
C
Chen Mingyuan · Starship TechHead of Marketing · known 2 years
Warming
OpenHe's waiting on your quote — 3 days now
LandmineNo calls at lunch; leave him a way to save face
RadarWhat you promised, what you're owed, who has supply and who has demand — promise radar, lead matching and the favor ledger remind you proactively. Stop keeping it in your head.
PromiseEvent plan due to Mr. Li by Friday2 days left
MatchWang's team does custom dev · Zhao needs an outsourcerintroduce
FavorSun fixed your resume — you owe a dinner47 days
Cooling19 days of silence with old Zhouopener ready
InsightsIt finds connections you forgot existed: a report from three months ago and yesterday's chat are actually the same deal — linked automatically and pushed to you.
Q3 Industry Research.pdf↔Chat with Zhou Kai82%
Both are about the same acquisition target: the valuation range on page 41 answers exactly what Zhou Kai asked you last week.
SuggestSend him that page, then propose a call
Privacy is the baseline: chats are parsed on your own computer · plaintext is burned after reading · we never touch your passwords · delete everything with one click, any time.

Sound familiar?

Saved it — never saw it again.

The report a friend forwarded, the course you half-watched, the 47-minute meeting recording, the screenshot of a flash of inspiration — good things pass through your day. You saved them. They never got a second look.

Industry deep-dive.pdf09:30 · "worth a read," said your friendnever opened again
Meeting recording 47:1211:00 · "I'll write it up later"never played again
Long-read: Compounding13:20 · read halfway, hit savesank into the bookmark graveyard
Inspiration screenshot15:40 · a flash during a meetinglost among 8,000 photos
Course video · at 32:1519:00 · "I'll continue tomorrow"progress never moved
A decent idea23:00 · noted at the bottom of Notesforgotten by morning

That's one day: 6 valuable inputs — 0 ever used again. They should have been assets. Your second brain is built to catch them.

The single most powerful thing it does

It finds the faint threads across oceans of material.

A sentence from a two-year-old recording, page 7 of last year's report, a screenshot from last month, yesterday's note — each unremarkable alone. Connected, they're the answer. No human memory spans that far. It does.

2 years agoWeekly meeting.mp3
Last yearIndustry report.pdf · p.7
Last monthA random screenshot
YesterdayOne line in Notes
421 connections — that's what one real user's 93 files grew into, automatically. Different years, different formats, one web of meaning.

You've been in these moments

When the moment comes, the work is already done.

"The deck is due tomorrow… I know I saved material for this."

It pulls every relevant page, recording and report from six months of your life, drafts the outline, and generates the deck or doc in one click.

an afternoon of digging20 minutes

"I've definitely seen this formula — which book was it?"

Just ask. The answer comes back with the book title and page number. One click and you're at the exact line you once read.

30 minutes of flipping3 seconds

"This new idea… I feel like I've thought about it before."

It reminds you: three months ago you had the same thought — and left three files behind. Now they finally connect.

inspiration slips awaystraight to output

How it works

A brain that's only yours, raised in your own home.

Other AI products pull your data to their cloud. Compound keeps the brain at your place: your phone captures, an encrypted relay passes things along without storing them, and everything lands only on your own computer.

Your phoneSnap, record, jot — feed it on the go
encrypted relay · nothing stored
Your computerThe brain lives here — always on, always yours

Put it in your life

On your desk, and in your pocket.

One always-on computer is your second brain's home; your phone feeds it wherever you are.

Desktop

Local-first, always on, OCR and embedding models built in — not a word goes to the cloud. Lite suits most machines; HD excels at scans, complex layouts and tables (needs 16 GB RAM and a recent CPU). Full English UI included — switch languages any time in Settings.

Mac · LiteGeneral OCR · ~845 MB · fine for most Macs (Apple Silicon runs it natively via compatibility) Mac · HDHigh-precision layout/table/formula · ~2.6 GB · needs 16 GB RAM Windows · LiteGeneral OCR · Windows 10 / 11 Windows · HD — coming soon

Mobile

iOS · Android. Photos, voice notes, quick thoughts — capture anywhere, and it lands in your brain at home. Sign in with the same account and scan to pair.

Android · direct APKTap on your phone to install, or scan the QR code with your phone camera
Android APK QR code Scan with your phone camera to download the latest Android APK directly.
iOS · in TestFlight beta — public link coming soon

Questions or early access requests: konghesmileface@gmail.com