WhatsApp is the name of a mobile messaging app for Android, iPhone, Windows Phone or for Mac or Windows PCs. WhatsApp lets users make free voice calls, face-to-face video calls or text message. By using your wired Internet connection or connecting your device to Wi-Fi, users avoid SMS and data usage mobile carrier fees that are typically associated with texting and voice or video messaging.
Other features of WhatsApp include photo sharing, document sharing (up to 10-MB) and group chats where you can share messages, photos, and videos with up to 256 people at once. Also, mobile communications will sync with a desktop computer or laptop, so you can chat on whatever device is most convenient for you and keep a record of calls in one location.
By default, WhatsApp uses end-to-end encryption to secure messages and calls so only you and the person you’re communicating with can read or listen to them. Nobody in between (not even WhatsApp) can read what is sent. WhatsApp is part of the Facebook family of companies since 2014 and requires users to be at least 13 years old to use the service.