

The service requires a cellular mobile telephone number to sign up. WhatsApp's client application runs on mobile devices, and can be accessed from computers. It allows users to send text and voice messages, make voice and video calls, and share images, documents, user locations, and other content.

WhatsApp (also called WhatsApp Messenger) is an internationally available freeware, cross-platform, centralized instant messaging (IM) and voice-over-IP (VoIP) service owned by US tech conglomerate Meta.
