Although not cross-platform, FaceTime has one killer feature: it passes the mom test. Skype has passed it too, but not with as many flying colours as FaceTime.

Although not cross-platform, FaceTime has one killer feature: it passes the mom test. Skype has passed it too, but not with as many flying colours as FaceTime. Mom push button, mom video chatting with grand kids. No intervention from grand kids required.