There's no special WhatsApp app for iPads yet, but there are cool ways to use it on your iPad!
You can use something called WhatsApp Web; it lets you read and send messages from your iPhone on your iPad.
It's like magic! Your iPad shows all your WhatsApp messages from your iPhone, even pictures and videos.
It's almost the same as having a real WhatsApp app, so you can chat with your friends easily on your iPad!