WhatsApp Messenger is a cross-platform mobile messaging app which allows you to exchange messages and make phone calls without having to pay for SMS. It Is available for iPhone, BlackBerry, Android, Windows Phone and Nokia.
WhatsApp uses your existing internet data plan you have for email and web browsing, so there is no additional cost to send SMS or call. Users can also create groups, send each other images, video and audio media messages.
WhatsApp is accessible both on your phone and your computer. WhatsApp Web is a computer based extension of the WhatsApp account on your phone. The messages you send and receive are synced between your phone and your computer, and you can see all messages on both devices. Any action you take on the phone will apply to WhatsApp Web and vice versa.
Website URL: www.whatsapp.com/
WhatsApp's end-to-end encryption is available when you and the people you message use the latest versions of the app. This means only you and the person you're communicating with can read what is sent, and nobody in between, not even WhatsApp.
You can set your last seen, profile photo and/or status to the following options:
Everyone: Your last seen, profile photo and/or status will be available to all WhatsApp users.
My Contacts: Your last seen, profile photo and/or status will be available to your contacts from your address book only.
Nobody: Your last seen, profile photo and/or status will not be available to anyone.
You can report problematic content by contacting WhatsApp from inside the app.
You can block people on WhatsApp, which means you will no longer receive WhatsApp messages or calls from them.
The first time you receive a message from an unknown number you will be given the option to report the number to WhatsApp as spam directly from the app.
WhatsApp may ban accounts if they believe the account activity is in violation of the Terms of Service.
For more information about banned accounts and examples of activities that violate Terms of Service, please read this article.
WhatsApp uses your phone's Internet connection (4G/3G/2G/EDGE or Wi-Fi, as available) to send and receive messages. WhatsApp Calling works in the same way.
Please be aware that: