The Pixel Watch 4 runs Wear OS 6.1 with Gemini built in, and updates come through the Google Pixel Watch app on your phone. The process is straightforward, but you need an Android phone running 8.0 or later iOS isn't supported. Before you start, make sure both devices are charged and you won't need to leave the house for the next hour.
The watch needs at least 50% battery and should be sitting on the side-pin charging dock during the install. Keep your phone within Bluetooth range, about 30 feet, the whole time. Updates can hang if the connection drops mid-install.
Check Your Current Version
Open the Google Pixel Watch app on your phone and tap Watch > System > About. The build number under Software version tells you what you're running. You can also check this on the watch by swiping down, tapping Settings > System > About. Knowing your current version helps you spot whether the update actually took.
Keep the Watch on the Side-Pin Charger
Place the Pixel Watch 4 on its side-pin charging dock. The dock uses a proprietary side connection, not the old puck from the Pixel Watch 3 they're not compatible. The side mount lets you see the watch face while it charges, and fast charging is faster than the Watch 3. Let it charge to at least 50% before starting the update.
While it's charging, connect the watch to Wi-Fi. Open Settings > Connectivity > Wi-Fi on the watch and join your home network. Updates over Wi-Fi are much faster than Bluetooth or 4G LTE (the Watch 4 only supports LTE, not 5G).
Update Through the Google Pixel Watch App
On your phone, open the Google Pixel Watch app and tap Watch > System > System update. The app checks Google's servers and shows any available update with release notes. Tap Download and install to start.
The download takes a few minutes over Wi-Fi, longer over LTE. Once downloaded, the watch will prompt you to install. Tap Install on the watch screen. The watch reboots, shows a progress bar, and installs the new Wear OS 6.1 build. The whole thing usually takes 15 to 40 minutes.
Let the Update Finish Without Interrupting
Don't tap the watch, don't take it off the charger, and don't restart your phone during the install. The watch may reboot two or three times that's normal. The progress bar includes the post-install optimization where Wear OS rebuilds app caches. Interrupting can force you to factory reset and start over.
If you're using the always-on display, the watch face might lag slightly during this step. That's just the system juggling resources leave it alone.
Schedule Updates for Overnight
If you don't want to babysit the process, schedule it. In the Google Pixel Watch app, go to Watch > System > System update and enable Auto-update over Wi-Fi. The next time an update is available, the phone downloads it automatically and asks you to install when the watch is on the charger overnight.
You can also set a specific install time. Look for a Scheduled update option in the same menu. Pick a time when the watch is docked and you're asleep two-day battery life means it's usually still charged at night for casual use.
Unstick a Hanging Update
If the download stops at a percentage and won't move, force-close the Google Pixel Watch app on your phone (swipe it away from Recent Apps) and reopen it. Then try again. Sometimes a fresh connection is all it needs.
If the install progress bar freezes, wait at least 30 minutes before doing anything. The bar can seem stuck while the watch rebuilds caches in the background. After 30 minutes with zero movement, force restart the watch: press and hold the crown AND the side button together for about 35 seconds until the G logo appears. The watch reboots and either completes the install or rolls back to the previous version automatically.
Confirm the New Build
After the watch reboots to the watch face, check the version again. Open the Google Pixel Watch app on your phone and go to Watch > System > About. The build number should match the latest release. If it didn't change, the rollback happened just re-run the update. If it fails again, factory reset the watch via Settings > System > Disconnect & reset, then re-pair and try the update on a clean slate.
