Great app, atomic time.
It's amazing how you can regulate the accuracy of your watch depending on how you place it off your wrist at night.
My PO increases if placed on 9 side and decreases if placed face up. I alternate and manage to keep a 0.10 sec/day accuracy.

 

I can’t find that app? What is it called?
Can anyone else recommend a good timeograph app?

 

I'm using watch check on Android

 

There's a few. IMO, none of the free ones were any good. WatchTracker for iOS is pretty good.