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Contacts 4 brings a fresh new look, cleaner, with several color options. Option to change the image of the widget folder and the ability to leave it on the lockscreen (Android 4.2).

Let your contacts at the touch of your fingertips. Contact widget provides a beautiful way to get your favorite contacts or any group (possible combination of groups) on your screen.
Contacts widget has several configuration options enabling the choice of several actions when contact was selected, and several ways to display them on screen.

On a technical limitation, and there are differences between version available for Android and 4 2.1 - 2.3.