WhatsApp allows you to send free text messages over the internet, saving you the cost of sending SMS.
Complete alternative to SMS
WhatsApp Messenger replaces traditional SMS for a free instant messaging system over 3G, 4G, or WiFi.
The Windows Phone version of WhatsApp allows you to chart with your buddies through a classic chat-style window. You can chat to one person, or to a bunch of buddies through group messaging. The latter option makes for a good way to save on messages and communicate quicker.
In terms of its features, WhatsApp allows you to send photos, audio files, and videos. You can also share maps with your location, as well as contacts.
WhatsApp Messenger for Windows Phone includes a chat background feature, already found in the iOSand Android versions. This allows you to set a background wallpaper behind your chat messages, giving you the chance to pimp your own chats. The app also allows you to archive chats and groups; share your location by dragging and dropping a pin onto a map; and crop, rotate, and add captions to images.
How does it work?
In order for WhatsApp to work, both yourself and the person you want to chat with have to have the app installed. Once you've installed it, you can see which of your contacts are using WhatsApp and start speaking with them.
However, if you prefer to download Whatsapp on your computer download Whatsapp for PC
Whether or not WhatsApp is the best mobile messaging client is a matter for debate. Arguably it's not the most powerful, given that apps such as LINE and Tango have more interesting features than WhatsApp.
However, the strong point of WhatsApp is its popularity. Since lots of people use it as their messaging app of choice, it's become almost essential to have it installed on your phone (although in certain countries it's more popular than in others).
A success story
There are similar applications out there - better ones, even. But WhatsApp is an example of an app that offers a simple and fun way to chat. For this it's become hugely popular.
With the introduction of WhatsApp for Web, you can now send and receive WhatsApp messages right from your computer’s browser. To get started, visit web.whatsapp.com on your PC or Mac. This is only available on Windows Phone 8+.