Once the Clockology app has been installed and set up, it's easy to transfer a Lignite watchface to your Apple Watch.
In Safari tap on the top left to access your downloads:
In the dropdown menu tap on "Downloads":
Tap on the watchface you previously downloaded and it opens in the Clockology app:
Transfer the watchface to your Apple Watch by tapping the green watch button:
In the share menu tap on the watch app icon:
Tap the "Add to My Faces"-button and wait until the watchface shows up on your Apple watch:
That's it, enjoy!