WhatsApp is available to download from different platforms and app stores on mobile devices. You just need to download WhatsApp and start using its amazing features. Aside from being a voice and texts sharing app, WhatsApp enables you to make voice and video calls, and share images, documents, user locations, and other user-generated content. WhatsApp is a multi-platform messaging and voice-over-IP (VoIP) service, which allows users to send text messages and voice messages.