Calling someone who does not have Twigo is not free, but it is extremely cheap, after you purchase credits using your Credit Card from settings tab in the Twigo app, from www.twigo.com, or from any of our resellers, you can start making call to anyone. Either select the number from your existing contacts, or dial it directly form the dial pad, either way you will see the cost per minute next to each number or while typing the number in the dial pad.