Meta updated its Muse app for iOS today to add Apple Watch support, putting the company's proactive AI agent directly on the wrist. The update brings the Muse character itself to the watch, so users interact with the same persona they know from the phone app rather than a stripped-down utility interface.

The move is a notable piece of platform positioning. Muse is built as a proactive agent — one that surfaces things on its own rather than waiting to be asked — and the wrist is arguably the natural home for that model: glanceable, always present, and suited to short nudges rather than long sessions.

It's also Meta planting an AI assistant on Apple hardware at the exact moment Apple is working out the economics of its own Apple Intelligence features. A third-party agent living on the Watch competes for the same ambient-assistant role Apple presumably wants Siri to grow into.

For existing Muse users, the practical upshot is simple: the agent now follows them to the watch. For the broader AI race, it's another sign that the battleground is shifting from chat windows to persistent presence across every screen a user owns.