The company claims that all its voice and data services shared via its platform are 100% secure via its end-to-end encryption feature. Key components of WhatsApp include Video and Voice Calls with its ability to host group video calls. WhatsApp is arguably the best chat app that instantly lets you share images, videos PDFs, and all sorts of other file formats. WhatsApp Messenger is the most popular cross-platform internet messaging app the world uses to communicate, share multimedia, and transfer files.