Whereas the built-in world clock on the iPhone just shows the current time, a quick tap on the controls of TimeScroller will let you look at times later in the day, week, or even month. The controls let you step an hour or a day at a time, or use the scroller button to see the times rapidly update as you drag your finger. An even quicker way to organise that international conference call is to just tap on the cities you wish to speak to, then tap the "Suggest Time" button and let TimeScroller come up with a suggestion! Once a time has been found, tap on the "mail" button, and TimeScroller will draft an email for you listing the cities, and the respective times. The rules controlling the colours and the suitability of the times can be easily configured, for example after 9:00am is "good" and colored "green". Simple, compact display shows up to 9 cities without the need to scroll.  Takes into account daylight saving rules where appropriate. TimeScroller does not require an Internet connection