Uninstall Android Wear App From Real Device

I don't know if there is a user interface for this. The easiest way I've found is via adb:

adb uninstall [-k] <package> - remove this app package from the device                               ('-k' means keep the data and cache directories)

So, for example:

adb uninstall com.example.testandroidwear

As both @WaynePiekarski and @Thoast83 have mentioned, if the Android Wear device is connected via Bluetooth instead of a direct USB connection (e.g. when testing with the Moto 360) then you need to use adb -s <device> <command> as instructed by Directing Commands to a Specific Emulator/Device Instance in the adb documentation.

In this case, it might be something like:

adb -s localhost:4444 uninstall com.example.testandroidwear

provided you have established the connection exactly as described in Debugging over Bluetooth (otherwise, adjust the port number accordingly).

In case anyone is debugging via bluetooth and stumbles upon this thread, write:

adb -s localhost:4444 uninstall example.com.yourappname

When you install an APK via the Play Store or via adb to the phone, the embedded wearable APK is automatically installed to the wearable.

If you are developing and want to play around with things, or if you are doing debug builds which do not do the embedded APK, you will need to use adb uninstall to both the phone and the wearable.

You can use adb devices to discover the names of the connected devices, and then adb -s followed by the name of the device. You use the internal package name with the uninstall command.