Although the included Time app from Apple is useful enough, Time Zones + World Clock Time Converter (free with in-app purchase) goes Apple a few steps better.

The attractive GUI features the ability to rename locations, so you can call a place "Mom and Dad". The app displays the time differential in hours for all the locations you enter, and a 'quick check' mode lets you look up a date and time anywhere in the world, converting it to your local time. I could see that being useful for business calls in different time zones.

As the day moves along, the colors of the GUI change to reflect the time of day.

Gallery | 5 Photos

Time Zones app for iOS

The app is ad supported, and when you open the app a full page ad comes up that has to be dismissed, which I judge mildly intrusive. A in-app purchase of U.S. $4.99 removes the ads, but I think that is a bit too expensive. I'm getting along with the free version, and if the developer would lower the purchase price to $0.99 I think he would get more takers.

Time Zones + World Clock Time Converter is a nicely done app. It's more useful that what Apple provides, and has a nice look and feel.

The app requires iOS 7 or later. It seemed to work fine using iOS 8 beta 5, so I don't foresee any issues going forward.

Another app with similar features is World Clock Time Zone. It's free too but has a $1.99 in-app purchase which removes the ads. The screens are a little more cluttered, so I prefer Time Zones + World Clock Time Converter for quick ease of use.

This article was originally published on Tuaw.