Skype is a free app that allows you to make video calls and voice calls to other people who have Skype. The great thing about this app is that you can use it on the go, you won’t have to waste minutes on your cell phone service. It’s free between Skype users, but if you want to call land lines you will have to sign up for a Skype plan. The plans are very affordable. It’s really a great app if you make a lot of phone calls and need to stay in touch with people.