WhatsApp Messenger allows people to send text messages for free. The person's contacts must also have WhatsApp in order to receive the messages.
WhatsApp is a texting app that was purchased by the owners of Facebook. It is very similar to other free texting apps with a few extra features. The app boasts a map that can be seen by contacts to show the sender's location. Contacts can easily be shared within this app. It supports text, audio and video messages. It also gives the ability to set status messages, including setting the status as away if the person does not want to be contacted.