I bought this app for my iPhone 4 quite awhile before I left for an overseas trip in Turkey and Greece. Frankly, this app stinks. It is not all that intuitive to begin with, but then couple this with the fact that it does not seem to sync itself with the local time in the time zone which you are in, and what you have is a first class waste of money. I would avoid this app. Apple's standard clock is far more efficient and intuitive.