Apple users can download the FaceTime app free of charge. FaceTime is available for Macs running Mac OS X Snow Leopard v10.6.6 or later, iPod touch fourth generation or later, iPhone 4 or later, iPad 2 or later, and iPad mini, according to Apple.
Using FaceTime may incur fees depending on the user's network connection. FaceTime video calls run approximately 3 megabytes per minute, according to InformationWeek. Therefore, users should avoid making long FaceTime calls on cellular data.
An iOS or Mac user can make FaceTime calls to another iOS or Mac user by using the other person's phone number or registered email address. As an alternative, the user can switch to a FaceTime during an audio call.