A tiny, living companion that sits in your Mac's notch and gets things done.
Momo keeps your tasks, notes and habits, remembers what matters to you and answers questions, privately on your Mac whenever it can. When a job needs a bigger brain, it asks before borrowing the ChatGPT or Gemini plan you already pay for, or an API key you bring. There is no Momo server, no account and no subscription.
- It feels alive. Momo breathes, blinks, glances at your cursor, giggles when you poke it, dozes off when you step away, dances when music plays and yawns when it gets late. Every motion is procedural, so it never loops the same way twice.
- Local first. Apple Intelligence, Ollama or LM Studio answer everyday requests on your Mac. Tasks, notes, memories and voice all work offline (voice needs macOS 15 and Apple silicon).
- Your own subscription. Bigger jobs can go to ChatGPT through the official Codex CLI or to Gemini through the Gemini CLI, signed in with your account, or to Claude, OpenAI, Gemini or OpenRouter with your API key. Momo always asks first.
- Private by default. Before anything leaves your Mac, emails, phone numbers, IBANs, card numbers, national ID numbers and names are replaced with placeholders, and put back in the answer. A log shows everything that was sent.
- Does things, not just talks. Tasks with reminders, notes, habits with streaks, calendar events, focus sessions, opening apps and links, running Shortcuts, reading the screen (when you ask). Anything irreversible needs your OK.
- Talk to it. Press ⌥⇧Space or say "Hey Momo". Replies are read aloud in their own language and Momo's mouth moves with every word.
- Works with your agents. Momo ships an MCP server, so Claude, Codex and other agents can use your tasks and notes, and it can use your own MCP servers too.
- Speaks your language. English and Turkish today; translations are a single file.
- Make it yours. Seven looks built in, and your own with a few lines of JSON.
Download the latest Momo-x.y.z.dmg from
Releases, open it and drag Momo into
Applications. The app isn't notarized yet, so macOS blocks the first launch. To open it:
- On macOS 15 or later, open Momo once, then go to System Settings → Privacy & Security and choose Open Anyway next to the message about Momo.
- Or run
xattr -dr com.apple.quarantine /Applications/Momo.appin Terminal. - On macOS 14, right-click Momo and choose Open once.
Momo runs on macOS 14 or later. Voice features need macOS 15 or later on a Mac with Apple silicon.
Or build it yourself (Xcode 16 or later):
git clone https://github.com/uemrey0/momo.git
cd momo
make app # builds dist/Momo.app
open dist/Momo.appMomo walks you through this on first launch; everything lives in Settings → AI. Pick an option, press Connect and follow the steps. None of them need Terminal.
| Brain | What you need |
|---|---|
| Apple Intelligence | macOS 26 with Apple Intelligence turned on. Nothing to install. |
| Ollama | The free Ollama app. Momo downloads a model for you. |
| LM Studio | The free LM Studio app with its server switched on |
| ChatGPT plan | Sign in with ChatGPT. Momo uses the ChatGPT app's Codex or downloads the official Codex tool. |
| Google account | Sign in with Google. Momo downloads Google's official Gemini CLI. No API key, no extra charges. |
| Claude, OpenAI, Gemini API, OpenRouter | An API key; copy it and Momo picks it up and checks it |
Claude subscriptions can't be used by third-party apps. To use your Claude plan with Momo, connect Momo to Claude instead (below).
⌥Space and ⌥⇧Space are the defaults. Change or turn them off in Settings → General (Open Momo) and Settings → Voice (Talk to Momo).
Try "Remind me to call Ayşe tomorrow at 3", "What's on my calendar today?", "Start a 25-minute focus session", "Note that the Wi-Fi password is on the fridge" or "What's on my screen?".
In Settings → Connections, press Add to Claude Desktop, Add to Claude Code or
Add to Codex. For other agents, add an MCP server that runs
/Applications/Momo.app/Contents/MacOS/momo-mcp. Tools that delete data are only offered with
--allow-destructive.
- Requests go to a remote brain only when needed, and Momo asks first (you can allow a whole conversation, or turn on local-only mode).
- Personal details are masked before they leave your Mac and restored locally.
- API keys stay in your Keychain; Codex and Gemini keep their own credentials, which Momo never reads.
- Speech is recognised on your Mac. The screen is only read when you ask, with confirmation.
- No telemetry. The only other network request is a daily update check against GitHub, which you can turn off.
Your data is a single JSON file in ~/Library/Application Support/Momo.
Sources/
MomoFace/ Character engine, renderer and character packs (no dependencies)
MomoKit/ Data store, tools, personal data masking, brain router
MomoBrain/ Brain providers, CLI bridges and the assistant
MomoVoice/ Speech recognition, speech synthesis and the wake word
MomoMCP/ MCP server and client
momo-mcp/ The MCP server command shipped inside the app
MomoApp/ The macOS app
Tests/ Swift Testing suites for every library
docs/ Architecture, roadmap, ADRs and guides
Scripts/ Build, packaging, icon and localization scripts
Read the architecture overview, the character engine guide and the character pack format.
Contributions are very welcome: code, translations, character packs, docs and bug reports. Start with CONTRIBUTING.md and the Code of Conduct. Security issues go through SECURITY.md.
make test # run the tests
make run # launch from the command line
make lint # check formatting
make l10n # check translations
make snapshots # regenerate the README images