Whether you are a working official or someone who is chilling with friends on an exotic trip, making a call back home is essential. In such case, cheap calling rates is what every travelers look for. VoIP apps on your Smartphone are the essential in case of traveling. Why? Because, if you are staying in Europe and you need to make phone calls to other countries, like x, Y, z, you need to have a VoIP app of the cheap international call rates services providers.