VoIP apps for the iPhone : Skype

Skype is undoubtedly the most popular VoIP app of all. To make calls, simply select someone on your Skype contacts list and you’ll be talking in no time. On top of voice calls, Skype for the iPhone also allows for chats just like the desktop app. It also permits the user to set his or her status and profile information.

Skype also offers a range of subscriptions that make international calls remarkably inexpensive. You can either pay $5.95 per month to call unlimited landlines in one country of your choice, or $12.95 for any country in the world. This is definitely cheaper than normal rates.