US Timezones clock is a handy time-management app for iOS devices. It's designed to help users manage their schedules and keep track of the current time in the different time zones across the United States, from Alaska to the Atlantic Ocean.

The app includes four commonly used timezones in the US: the Pacific, Mountain, Central, and Eastern. It comes with a handy map showing the locations of the time zones. You can zoom in on the borders of these time zones, including those in Canada and parts of South America.

It's designed to work on iOS devices and is compatible with the iOS mobile operating system.