This launcher permits to use "clockskin" format skin on your full Android watch (not Android Wear). It also partially support the "watchmaker" skin format.

This app uses the Device Administrator permission in order to lock the screen.
Also this app is meant to replace your watch launcher and uses all usual permission to do this : PHONE, WIFI, and so on.

Watch the tutorial video if you have any issue.
https://www.youtube.com/watch?v=qbgxI8lH86E&t=42s

Full details are given on the help forum.
https://discourse.fullandroidwatch.com/t/universal-launcher-ver-3-x-and-above/