WebRTC has taken over internet calls, making it the onus of communication. WebRTC enables web application and mobile applications to stream peer-to-peer audio/video calls directly without the requirement of third-party integration. Though there are multiple other languages to build WebRTC, such as peer.js, node.js, in Linux and Firebase, JavaScript rules out all the other programs with its phenomenal features. Let us take a close look at the parameters that pushes JavaScript over other languages. Every other webRTC signaling server has the potential to build a cross-platform chat app that works on android/iOS. The short span of time JavaScript/node.js consumes to design a multi-user real-time application holds high potential to synchronize with the requirements the client delegates. WebRTC video chat apps can be loaded as a server-side proxy and offers non-blocking IO, a set of features that can handle towering numbers of connections simultaneously. The system will not occupy excessive RAM space with video calls allowing a large number of calls to take place on the go. Creating a video chat app using android/iOS javascript does not stop with providing video-voice internet calls through apps. The community is also growing up to provide exceptional modules that are absolutely ideal for integration of video call into the website and mobile applications. Socket.io is used to manage the constant communication between both the servers to provide real-time updates on the go. Apart from building WebRTC for video chat app, opting for a third party integration of video call into website/app and video calling integration providers has the potential to create a peerless video chat app that runs on Android/iOS or Web - any platform of your choice. Contus Fly is a readymade messaging SDK for Android & iOS, Chat API for Website, WebRTC solution provider, that has over a decade of experience in building chat apps. They have successfully delivered real-time video/voice chat functionality across multiple browsers & platforms for giant telecom services. The WebRTC signaling customization option they offer attract multinational brands as the video/voice call chat functionality operates with zero lag.