WhatsApp is fully compatible with Windows phones, and Windows Phone users can download it for free. WhatsApp is an instant messaging app that allows users to message and call their friends and family.
This app lets users send and receive calls, messages, voice messages, videos and photos. The first year of using the app is free, and WhatsApp charges $0.99 per year after that, as of 2015. WhatsApp uses the phone's Internet connection, whether it is EDGE, 2G, 3G, 4G or Wi-Fi, so users don't pay for each call or message. It allows users to exchange contacts, set custom notification sounds and share their locations.