Apple took over a week to respond to the flaw, which has prompted an investigation from the New York attorney general's office.
The app supports up to 24 people on a call.
Simply create an account and add your friends to your contacts list.
Most recently, Skype added the ability on mobile and desktop to record, save and share your video calls.
Last year, Microsoft upgraded the app to include captions and subtitles.
Facebook's Messenger app (download for iOS or Android) is a video call platform widely used because of its association to the social media network.