One of the first, still one of the best

The exact time as provided from Internet Time Servers, well displayed and easy to use. As others have said, this app was one of the first I downloaded, and I still use it--for instance, every time I take a flight to another time zone. Whenever I need to make sure my watch is keeping accurate time (or to set my watch it needs it), I bring up my Atomic Clock app.
Its a real workhorse of an app, and it "just works". 5 stars from me!

Breathes underwater about Atomic Clock (Gorgy Timing), v4.51