Whatsapp is currently the most popular chatting application in the market. Probably because it works on every operating system that is out there. It works perfectly on Apple's iOS, Google's Android, Nokia's Symbian and Blackberries. The only problem is that it requires a phone. It needs a SIM card. So it doesn't work on an iPad or an iPod Touch. But here I will show you how to get it to work on these devices. But you will need a jailbroken device.
First, you have to get it to download. Use your computer to download it or use Installous or any other way to install it on your device.
Second, you will have to open up Cydia and search for "Whatspad". It is a free jailbreak tweak under the BigBoss repo that allows Whatsapp to work on iPads or iPods.
Install Whatspad and you are good to go. Open up Whatsapp and it will ask you type your phone number. Type your actual phone number and it will send a text message to your phone telling you the code that you should enter on your iPod/iPad. Type the code on your iDevice and you got your self Whatsapp on iPod/iPad.