I've been using the Berlin Clock clock face on my Bangle.js 2 and I'm really liking it. It's fun an unique and certainly gets peoples' attention when they see it!
I'm still a little slow at reading it, so I made a little app to help practice with: clock coach.
There are almost no features - it flashes red if you get it wrong, and it flashes green if you get it right and generates a new random time. You can check the code here.
Maybe nobody cares about this, but thought I'd share just incase!
After I perfect this clock face, I'm planning on checking out the Binary Watch clock face next...