The app runs more like a plug-in than an app, as the user doesn't need to run the application after installing it for the first time. The user can make calls using the regular phone dialer and the app automatically takes over the call if both phones have it installed and are connected to the Internet. Users can also see which contacts are currently online on the app. Like WhatsApp, a user's phone number becomes their identity, and apart from that the app doesn't ask for any more details. If your contacts start using the app, your calls are automatically routed over the internet with no input from you or your contact.
