This is great. I spent years looking for an affordable battery-powered WiFi clock that syncs via NTP since where I am, the WWVB clocks never pick up the radio signal.

I never considered making my own. Anyway, about two years ago this option popped up on Amazon. I've been happy with it:

https://www.amazon.com/OCEST-Wall-Clock-12Inch-Auto/dp/B0DJS...

I'm guessing internally it's not much different than the DIY clock in this submission.