Will I be charged for using skype?

[Artemis]

Is this free or is there a charge?

[Ginnungagap]

Skype has its own in-app purchasing system for airtime. There shouldn't be any additional charges but the app does use data so if you use the app within reason, it shouldn't exceed the limits of your data plan. I would use the app over WIFI when possible. Keep an eye on your cellular data use otherwise.