[isomorphic]

Floridian here. WWVB has never worked for me indoors (never tried outdoors). I've tried multiple vendors' clocks in multiple houses (wood frame and concrete). I assume the coverage is fine outdoors or with a sufficiently large antenna, but none of the clocks I've seen even have a mechanism to connect such an antenna. I could hack one, but then it would probably stop being cheap and reliable.

I'd love to buy an off-the-shelf WiFi+NTP clock, but everything I've seen is very expensive, intended for commercial timing applications or synchronizing clocks across a campus.

[MengerSponge]

You can spoof the wireless signal if you don't get coverage. There are surely more and better Android options, but I used Clock Wave to set a clock from Germany back in the US.

https://cw.rzapps.com/

It's really clever! It uses the speaker as the low frequency transmitter. It doesn't sound right, but it only needs the coil to radiate EM waves.

[js2]

Ditto in NC. I got this WiFi/NTP clock a couple years ago. Works great if you want an analog clock:

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

[moduspol]

I just deleted my sibling comment because I was recommending the same clock. I set it to do its daily WiFi time sync at 4am so that any DST adjustment happens before I wake up. No issues so far.

I have two of them. One project on my list is to see if I can modify the face of it to a different style without breaking it.