For customizable watch face, go to this website:
https://watch.bbqe.comBTW,there are some things you need to set up after installing the apps:
1.In Apple watch app, General>Wake Screen>On Screen Wake Show Last App>Always
It's to make sure that every time you raise your wrist, it's the watch face app that shows, not your original watch face
2. Can only install new watch faces with app opened on both AW4 and your iphone, and both the screens have to be activated
3. DO NOT EVER TURN OFF THE AW4 SCREEN BY COVERING THE SCREEN WITH YOUR PALM, OR THE WATCH FACE APP WILL CLOSE (actually, this closes all apps)
I find this annoying as I do shut the screen by covering the screen with my palm, and it's such a pain in the ass everytime I accidentally close the watch face app, now I only use the watch face app once in a while LOL
Hope it helps.