by WhatsApp Inc.
Download this app if: you want to make the switch from SMS.
WhatsApp Messenger is a smartphone messenger available for Android and other smartphones. WhatsApp uses your 3G or WiFi (when available) to message with friends and family. Switch from SMS to WhatsApp to send and receive messages, pictures, audio notes, and video messages. First year FREE! ($0.99...
WTF is Up with Whatsapp? — I downloaded this to my Galaxy Nexus with all my hundreds of contacts visible but it only shows I have 15 contacts that use the app and I know there are more. I even manually entered a new contact overseas, refreshed and it still does not come up in my contact list.