WhatsApp does not charge users money to send messages. New users receive a one-year subscription to WhatsApp for free. After that, the app costs $0.99 per year for unlimited use.
While WhatsApp messages are free to send, the program requires an Internet connection to work. Some smartphone service providers charge for data, so users might have to spend more to send WhatsApp messages through their mobile Internet connection if they exceed their data allowance. WhatsApp allows users to avoid the cost of standard SMS messages. These costs can rise even higher for international SMS messages, which has helped fuel WhatsApp's popularity through much of the world.