Earlier skype was only the way for video calling and also you need to pay for that also but now google introduced its own google duo which destroys each and every other video calling apps. You just need to sign up with ypur mobile number and verify it with otp which google send u via sms and you are done. You can video call with anybody in the world for free, just you need his/her mobile number to communicate. The video calling so accurate that you forget all other apps which you use earlier. I recommend everyone to download this app