This a simple video calling app. To use this app you have to log in first with your mobile phone number. After log in you have to set your profile first. Then you will see other users of this app by their username by tapping at the upper right corner with the symbol of contact. To call your desire user you have to sent a request first. After accepting request by your friend or desire contact you will be able to call her/him. But remember one thing, to connect your video call with your friend both of you have to present on this app at a time.