How can I install WhatsApp on iPad mini (cellular)? It's not jailbroken and I am using iOS 7 but I cant install WhatsApp on it.
WhatsApp Messenger is currently not optimised for iPad, and therefore you will need to search for iPhone apps in the App Store search using the filter at the top.
There is one that I would recommend, it covers almost all features from WhatsApp Web and it is quite fast on iPad: iPad Messenger for WhatsApp - Free
It's very sad that WhatsApp does not offer a client for iPad and I've been trying a lot of ways to get it working on iPad without jailbreaking. The web version is for sure the most secure and reliable way to use it on iPad. It is actually pain less to use. The most of the apps on the App Store are not reliable at all because of the excessive ads showing.