Your Mac deserves a companion.

Run animated desktop pets on macOS. Interactive, expressive, offline‑first. No cloud. No setup.

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Apple Silicon·Intel Mac·macOS 13+

Mischi.app

Activeidle

Trigger states

Click the pet · double-click to jump

How it works

Up and running in minutes

Import your pet

Drop in a folder or .zip containing your spritesheet and pet.json. Any existing Codex pet works out of the box.

Pet appears on desktop

Mischi renders your pet in a transparent, always-on-top window, right on your screen, without blocking your work.

Customize & interact

Set behavior modes, tweak animation speed, pick what triggers reactions. Your pet adapts to your workflow.

Features

See Mischi in action

Conversational

Talk to it, it talks back

Mischi isn't just decoration. Strike up a conversation and your pet replies in its own chat bubble, right there on your desktop. No window to open, no tab to find.

Lives on your desktop
Responds in context
Always within reach

AI-powered · Groq · BYOK

Bring your own key

Mischi ships with Groq, so chat is bring-your-own-key. Drop in your Groq API key, pick from the available models in settings, and everything runs on your terms. Press ⌘K to open chat anytime.

Bring your own Groq key
Pick from Groq's models
⌘K to open chat

Animations

Every move, yours to script

Idle, walk, wave, jump: map each animation to behaviors and chat lines. Tune how your pet reacts until it has a personality that feels genuinely alive.

Idle, walk, wave, jump
Map your own chat lines
Reactions that fit you

Your collection

Swap pets whenever

Switch between any pet you've imported in a single click. Build a roster and change the vibe of your desktop on a whim. A focused cat now, a playful blob later.

One-click switching
Unlimited roster
Import any format

And everything under the hood

Offline-first

Everything runs locally. No server calls, no cloud, no internet required.

Transparent rendering

Pets render on a transparent layer. They live on your desktop, not in a box.

Always-on-top

Stays visible across every Space and full-screen app without blocking a thing.

Menu bar controls

Pause, hide, or switch behavior modes straight from the macOS menu bar.

No telemetry

Zero analytics, zero tracking. What runs on your Mac stays on your Mac.

Apple Silicon native

Built for M-series, smooth on Intel too. macOS 13 and up.

Waitlist

Be first to meet Mischi

Mischi isn't on the App Store just yet. Drop your email and we'll let you know the moment it launches.

No spam, ever. Just one email when Mischi is ready.

Platform

macOS 13+

Arch

Universal

Price

Free

FAQ

Questions, answered

Everything you might want to know before installing.

Yes. Mischi is free to download and use. There are no accounts, no subscriptions, and no paid tier. If you enable AI chat with your own Groq API key, the only cost is whatever Groq charges for usage.

No. Mischi runs entirely on your Mac. No accounts, no servers, no telemetry. The only network activity happens if you opt in to AI chat, and even then requests go directly from your Mac to Groq, using the API key you supplied.

Mischi ships as a Universal Binary for macOS 13 (Ventura) and later. It runs natively on Apple Silicon (M-series) and on Intel Macs.

Mischi ships with Groq and is bring-your-own-key. Paste in your Groq API key, choose from the available Groq models in settings, and requests go directly from your Mac to Groq. Mischi doesn’t sit in the middle, doesn’t bundle a model, and doesn’t sell credits. Press ⌘+K to open chat.

Everything lives locally in ~/Library/Application Support/Mischi/: pet packs, preferences, and (if you enable it) your AI chat history. Delete that folder to fully reset Mischi. Each pet is a self-contained directory you can copy, back up, or share.

Yes. Pets are just a folder containing a pet.json and a spritesheet (PNG or WebP, 192×208px per frame). The creator docs walk through animation states, hitboxes, and frame timing. A visual editor is on the roadmap.

Not today. Mischi relies on macOS-specific window behavior: transparent always-on-top overlays that work across Spaces and full-screen apps. A Windows port is something we’re exploring. iOS isn’t on the roadmap, since the sandbox model doesn’t allow desktop pets.

No. The app has no analytics, no crash reporting, and no usage telemetry, and it never phones home. The only thing we ever collect is your email, and only if you opt in to the launch waitlist. See the Privacy Policy for the full picture.

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