What does Fetion mean? And what does it mean that text messages are free?

Fetion is an instant chat software that can directly communicate with mobile phones and send text messages to each other. Fetion can send text messages to mobile phones for free. No fees are charged. However, there are two situations when sending text messages to Fetion with a mobile phone. One is to pay for the text message by text message, and the other is to install Fetion on the phone and pay according to the traffic.