Binary Clock is the best looking chronograph available on the MacStore.
Binary Clock app gives you, a binary clock and a digital clock in one, which makes it very easy to learn reading binary clocks!
Binary Clock displays the current time (hours, minutes, and seconds) in binary.
Binary Clock is fully resizeable and keeps good looking at every size. If you just leave the room and switch to fullscreen or if you work and resize "Binary clock" to put it into a corner.
Binary Clock can be easily customized in order to suit your needs.
NOTE: Binary Clock can only be purchased via the Mac App Store (the buy link redirects you to its App Store page). To purchase/download applications via the App Store an Apple account is required.