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Wristotle

Companion release Companion build F-Droid

Watch release Watch build

License Buy Me a Coffee Liberapay

Voice assistant for the Pebble smartwatch — runs on your phone by default, no cloud required.

Press select on your Pebble. Speak. The command runs on your Android phone — call a contact, send an SMS, set a reminder, open an app, play music. Transcription happens on the device with Whisper (or any OpenAI-compatible cloud / self-hosted endpoint you opt into); intent classification happens on the device with a small sentence encoder. By default, nothing leaves your phone.

What you can say

Say on the watch What happens on the phone
"Call Mom" / "Ring Mom" Places the call
"Text Dad I'll be late" Sends the SMS
"Remind me to pick up milk at 5pm" Creates a watch-side reminder
"Cancel reminder" Cancels the most recent reminder
"Open Spotify" / "Launch Maps" Launches the app
"Play Audible" / "Pause" / "Next" Cross-app media control
"Rewind 10 seconds" / "Skip ahead 30 seconds" Seek within current track
"Ask agent what's the capital of France" Routes the question to your configured LLM (Anthropic / OpenAI / OpenRouter / Ollama / …)

Full list with paraphrases on the Voice commands page.

Why Wristotle

  • On-device by default. Whisper runs locally; intent classification runs locally. Dictation audio never leaves your phone unless you opt into a cloud or self-hosted speech endpoint (OpenAI / Groq / Cloudflare / Speaches / whisper.cpp HTTP server / …). No account, no subscription, no telemetry.
  • Works with any media app. Open and control Spotify, YouTube, Audible, Pocket Casts, or any app that registers a MediaSession — across apps, even with the screen off.
  • Conversation history on the phone. Every command (and what the phone did with it) is saved in a chat-style timeline, with retention you control (1 / 10 / 20 / 30 days, default 10).
  • Replayable dictation audio (microPebble only). Opt in to save the recording for each dictation so you can listen back. Last 5 are kept, off by default for privacy. Not available under Core Devices, which runs its own dictation — the audio never reaches Wristotle.
  • Backup & restore. Export your notes, tasks, conversations, learned phrases, app + contact aliases, reminders, and settings to a ZIP file (anywhere — Drive, OneDrive, local file). Optional AES-256 password protection. Restore later or on a new device with a merge-by-ID flow that won't overwrite existing data.
  • Confirm before send (optional). Turn it on and any action-taking command (call, SMS, reminder, calendar create, app launch, media play) pauses on the watch with a "What I'll do: …" summary first. SELECT to send, BACK to cancel. Configurable timeout + default action.
  • Ask Agent (optional, bring-your-own-key). Say "ask agent <question>" / "ask claude <question>" to route to any LLM you configure (Anthropic, OpenAI, OpenRouter, Ollama, llama.cpp, …). Add HTTP MCP servers under Settings to let the LLM call tools (GitHub, custom MCP servers, …) and the watch shows a per-tool status line during the agent loop. Off by default — until you paste an API key, the intent answers "No agent key set" and nothing leaves the phone.
  • Open source. AGPLv3-licensed. Sideload, fork, audit.

Two pieces

Wristotle is two apps that work together:

  • Watch app — .pbw for Pebble (basalt / chalk / diorite / emery / flint / gabbro). Owns the on-screen chat, dictation triggers, vibration feedback, quick-launch, and local commands (time, battery, steps, find phone).
  • Android companion — on F-Droid, or sideload the APK from Codeberg. Bridges the watch to phone capabilities (calls, SMS, reminders, app launch, media control), runs the speech recognizer (on-device Whisper by default, or any OpenAI-compatible cloud / self-hosted endpoint you configure) + the on-device intent classifier, persists the conversation history.

You also need one of microPebble or Core Devices (formerly rePebble) — those handle the BLE link to the watch. Wristotle plugs into them. Note that Wristotle's on-device Whisper only intercepts watch dictation under microPebble; Core Devices handles its own dictation pipeline. See Install for the tradeoffs.

Get started

  1. Install — companion from F-Droid (watch app from its store) + first-run setup
  2. Voice commands — what to say
  3. Troubleshooting — when something doesn't work
  4. Bug reports — the in-app diagnostics export