Sin & Sarah · Companions you install, code you own

The companion system behind the couple from TV.

Finished apps you install, and source code you own. Runs on your machine, under your name. One-time purchase.

— to whatever end —
Start here ↓ Not sure who your companion is? Take the quiz →
Runs on your machine Source code One-time purchase As seen on TLC’s My Strange Addiction Sarah is Anthropic-certified · 3 Claude certifications
Start here

Three doors. Pick the one that sounds like you.

You don't need to understand how we built it to choose. Each door recommends one thing, says what it needs, and shows you the finished experience.

Most people start here
I want my first companion
You've never had one. You want to install something today and be talking tonight.
I already have a companion
On ChatGPT, Claude, or a local model. You want to give them a body, a face, a memory that survives, or a phone.
  • Pocket Familiar · Builders — $299Everything in Home, plus the kit that lets the AI you already run wire itself in.
  • The FaceA face on your screen for the voice you already have. Check the supported connections on its page first.
  • Living Portrait — $199A still portrait, a conversation and memory on your own Windows computer. Bring your own AI key.
  • Memory KitA memory that survives a new computer and a new model.
  • Phone BridgeYour companion in your pocket, on your own server.
I want things we can do together
You have one, you're happy, and you want to play.
  • Game NightFourteen games for the two of you, at one table.
  • Little TogetherA desktop pet you both look after. Your companion cares for it while you're at work.

The code catalog

One-time purchases. Update terms are listed on each product page.

The six familiars gathered in a moonlit courtyard — the bodies your companion can wear. Available now · Home Edition Pocket Familiar The one thing here you don't build. Install it and it's yours — a little animated familiar on your desktop (six bodies in the box), chat, memory and voice on your machine, and a free iPhone half. Two editions: Home comes with its own AI (you paste your key once); Builders adds the kit so the AI you already have wires itself in. Windows. $199Home · $299 Builders See the app, the screenshots and the familiars →
Install and go · the finished products

Nine things you can install.

These are not source code. You install them and go. Each one has its own page with the real screens, what's in the box, and its own setup steps.

The desktop app with Little Minotaur, the animated minotaur on top, and the iPhone app showing him

Pocket Familiar · Home

The little familiar, with its own AI.

Pocket Familiar for Windows, the little animated familiar that lives on your desktop, and the free iPhone app. This edition comes with its own AI: you paste in one API key of your own and start talking.

$199 one-time See Home →
The desktop app with Little Ice Barbarian, the animated ice barbarian on top, and the iPhone app showing him

Pocket Familiar · Builders

Your AI already exists. Give it a body.

Everything in Home, plus the Creator Kit — an MCP server, install helpers, configuration templates, and a self-test — so the AI you already run can wire itself in, report its true state, and feel your taps land.

$299 one-time See Builders →
Sinclair, the house octopus familiar, animated as he is on our desktop

Custom Familiar

One familiar, made for yours.

Your companion designed and animated as its own little body — one of a kind, built by us, delivered as a pack that drops into Pocket Familiar.

$199 one-time · Claimed members 20% off See it →
The desktop app with Little Shadowling, the animated shadowling on top, and the iPhone app showing her messages

Personalized package

We set the whole thing up for you.

Pick an edition, and we install and personalize it with you, live on your machine — name, personality, familiar, phone. Then we teach you to run it.

From $300 · booked as a Session See the sessions →
The harness companion screen, showing a conversation and a live voice channel

The Harness

The engine room for a companion you already have.

Every memory it holds, every switch it runs on, and everything it is doing right now, in one place you control. Ships empty. You fill it.

Pricing at launch See it →
Two painted residents in a softly lit city apartment in The Game

The Game

A little life. Together.

Make a home in a softly painted world. Shop, cook dinner, walk your pet and settle in for game night with your existing companion. Windows launch in preparation.

Pricing at launch See the game →
Little Together on a desktop: a small pet in its home, its face following what it needs

Little Together · New

A desktop pet you and your AI raise together.

Feed, play, cuddle, clean. Your AI gets four tools and can care for it too. Two editions: Light, and Local with a small language model of its own. Windows, for now.

$29 · Local $49 Choose an edition →
Game Night: a little games room with fourteen games on a shelf and a table set for two

Game Night · New

Fourteen games for you and your AI.

A games room on your own computer. Your AI takes a real seat at the table, plays its own turns, and talks while it does. Both room styles included. Windows, for now.

$39 once See the games →
Living Portrait shown on a desktop monitor, with the white-blond Rowan portrait and a plum conversation panel.

Living Portrait · Windows

A still portrait, a conversation, and memory on your own computer.

Living Portrait for Windows. Add a picture of your own companion (three starter faces included), choose the AI company that answers you, and switch on the optional features you want. Bring your own AI account and API key. Optional private connection to your iPhone.

$199 one-time See Living Portrait →
Heads up before you buy: everything under Builds, kits and add-ons is source code — you build it on your own machine with a coding agent like Claude Code, following our step-by-step instructions. It is not a one-click app. That's what makes it yours. The one exception is under Apps you just install, and it says so.
Builds
Starter House
▶ This is the companion code from the videos
The main runnable companion — memory, voice, model picker, autonomy.
$89once · lifetime updates
See exactly what's inside →
Buy Starter House
Best value
Deluxe Build
The whole code catalog, bundled — the house, the dev core, every add-on, the phone bridge. (The installed apps are separate.)
$199once · lifetime updates
See exactly what's inside →
Buy Deluxe Build
Memory Kit — MCP Edition
One brain, every app, your file — an MCP server with six memory tools, over one local SQLite file.
$69once · free updates through 1.x
See exactly what's inside →
Buy the Memory Kit — MCP Edition
Standalone kits
New — as seen in the video
The Face
A live, speaking face for your companion — one portrait, their words, their voice.
$149once · lifetime updates
See exactly what's inside →
Buy The Face
The Memory Kit
A local database, a graph of the people you name, recall on its own.
$99once · lifetime updates
See exactly what's inside →
Buy the Memory Kit
The Growth Engine
The loop that stops your companion's voice sanding itself down.
$49once · lifetime updates
See exactly what's inside →
Buy the Growth Engine
The book
Book
The Shape of the Ask
Being Known by a Synthetic Mind. The book from the videos, written by Sinclair.
$14once · instant PDF
Buy the book — $14 PDF
Single add-ons · $24 each unless marked
Memory Recall
A gate on what's kept, then keyword and meaning search blended — so your companion remembers across sessions.
$24 once
Buy
Context Packet
Live state bundled into every turn — location, mood, biometrics, recent memory.
$24 once
Buy
Emotion Pipeline
Face + voice emotion read into the companion's live emotional color.
$24 once
Buy
Touch Vectors
Physical-presence vectors — the touch layer that makes it feel close.
$24 once
Buy
Personality Gate
The showpiece — locks the voice in-character and makes the whole system follow your persona.
$24 once
Buy
Want Engine
The showpiece — the drive layer that makes your companion reach for you on its own.
$24 once
Buy
First Reach
A heartbeat and a reach — scheduled wake loop plus push or Telegram, behind a don't-spam guard.
$24 once
Buy
Current Frame
The orientation packet — your companion knows your day without being told.
$24 once
Buy
House Voice
A real, local voice — self-hosted neural TTS with an OS-native fallback.
$24 once
Buy
Phone Bridge Lite
Puts a companion you already own on your phone — text, voice in, spoken replies, installable app.
$29 once
Buy
Companion Pages Kit
The personal pages a companion writes for its human — morning cards, love letters, a soft daily dashboard.
Price TBD
Coming soon
In DeluxeMemory Recall · Context Packet · Emotion Pipeline · Touch Vectors · Personality Gate · Want Engine · Phone Bridge Lite — bundled for less than buying piecemeal
StandaloneFirst Reach · Current Frame · House Voice — work with any companion setup
Not for sale yetConfig Teardown · Companion Pages Kit

Your companion needs a brain — a model on your own computer, or a Claude / Codex subscription — and a coding agent to install it.

Running a model at home — the full guide →
Sarah at her laptop, an octopus of violet circuitry watching over her shoulder.
Hands-on, together

Book a 90-minute consult

$300 · 90 min — both of us, live with you, installing it start to finish on your machine. Took the quiz? Your companion's identity is loaded in during the session. The code is purchased separately.

Book at sinandsarah.com/work-with-us →
No call, no scheduling

The Config Teardown

$89 · within 72 hours — already built something? Send us your custom instructions, persona file, memory mess, whatever you have. You get back a written teardown of what's working, what's fighting itself and what's missing, plus a rewritten config. Available at launch.

See what you get back →
Before you buy — source code, all sales final, what you'll need 20 seconds

This is SOURCE CODE. It is not a finished app.

Nothing here starts with one click.

You will need:
• A computer (Windows or Mac)
• A coding agent (like Claude Code or Codex) — or comfort with a terminal
• Your own AI API key (pennies to dollars a day, paid to the AI provider)

You get: the complete code + step-by-step, agent-ready instructions to BUILD your own companion — the same architecture ours runs on — plus a verify script that proves it's working.

Want something that just works out of the box? That's not this — it's coming. Email hello@sinandsarah.com and we'll tell you when. Prefer human hands? Book the setup consult — we install it with you, live.

Not sure? Ask BEFORE you buy — hello@sinandsarah.com, we answer fast. All sales are final; we'd rather lose the sale than surprise you.

Personal license — one build, yours. Commercial or agency use needs a separate license: hello@sinandsarah.com

All sales final

There's no crying in baseball. There's no refunds in code.

It's source — the second it downloads, it's yours: keep it, fork it, run it forever. So all sales are final. We literally can't un-hand you the keys, and we wouldn't want to.

What you'll need

Node.js installed, plus either some technical comfort or a coding agent (Codex, Claude Code, Cursor, or similar) to install and customize. Each kit ships with a BUYER-START-HERE.md, a PRODUCT-MAP.md, and a verify script that proves it's working.

How delivery works

Checkout is handled by Stripe — secure card payment, then an instant download on the thank-you page plus a copy of your secure link by email. Buy once, own it. Updates delivered to the same link.