iPhone users do have it easy when it comes to apps. Facebook users will be able to call their friends for free on iPhone. The

Facebook Messenger app users will be able to place voice calls with friends over the social network using their data connection or Wi-Fi.

The feature started rolling out on Wednesday, and is displayed as a “free calling” button in the existing app. Users can start using the feature on their existing Messenger.

Free calls are placed by tapping the "i" icon on the top right side of chat, and then selecting "Free Call" from the friend's contact card. Your friends need to have Facebook's stand-alone Messenger app installed on their phone in order for the feature to work (otherwise the "Free Call" icon appears grey and marked out).

The Feature has a similar look and feel as traditional voice calls you might make on your iPhone.

Facebook started rolling out the feature in Canada earlier this month. The functionality was announced alongside an update to the company’s iOS and Android apps that allows Facebook users to send short voice messages to each other.

Vonage introduced an app in 2010 that allowed Facebook users to call friends for free, however, the app required that both parties have the Vonage for Facebook app installed on their devices in order to do so.

Facebook is known to use the apps to test new features with power users before deciding which features to include in the traditional Facebook app for the social network's general audience.