WhatsApp is an instant messaging app for smartphones that operates under a subscription business model. The proprietary, cross-platform app uses the Internet to send text messages, images, video, user location and audio media messages. — According to Wikipedia
How WhatsApp works
WhatsApp Messenger is a mobile messaging app which allows you to exchange messages without having to pay for SMS. WhatsApp Messenger is available for iPhone, BlackBerry, Android, Windows Phone and Nokia and yes, those phones can all message each other! Because WhatsApp Messenger uses the same internet data plan that you use for email and web browsing, there is no cost to message and stay in touch with your friends.
In addition to basic messaging WhatsApp users can create groups, send each other unlimited images, video and audio media messages.
The best part of it is that… You can still use WhatsApp on your web browser. The web version is simply an extension of your phone: the web browser mirrors conversations and messages from your mobile device — this means all of your messages still live on your phone.
How to turn on WhatsApp for Web
In order to use WhatsApp for web, you need to turn it on for it to function…
To turn on WhatsApp Web you must first pair your phone and computer:
Here is what you should do to connect your web browser to your WhatsApp client,
1. simply open — https://web.whatsapp.com in your Google Chrome browser.
3. Scan the QR Code on your computer.
Now click on “OK, GOT IT” and let the scanning of your QR code starts.
Just that and you’re ready to go…. You have now paired WhatsApp on your phone with the WhatsApp web client.
Note that, your phone needs to stay connected to the internet for our web client to work, and please make sure to install the latest version of WhatsApp on your phone.
The sad part is, Whatsapp does not provide web client to iOS users due to Apple platform limitations.
At first WhatsApp Web only worked on Google Chrome only, but now you can use it even on Mozilla Firefox.How WhatsApp works.