WhatsApp Messenger is no longer available to download in the iOS App Store.

If you haven't heard of WhatsApp Messenger, this handy iPhone app allows users to message other smart phone owners for free. It's a great application, and one I've been using for a while. Indeed, the only limitation is that there's no WhatsApp iPad app, which is a shame. Fortunately, one jailbreak developer has managed to port the iPhone app over, and will be releasing WhatsPad (the iPad version of WhatsApp) in the Cydia Store soon.

The popular instant messaging application, WhatsApp Messenger, is now available to download for free. Currently, the app - which is a personal favorite of mine - is natively compatible with the iPhone.

A stripped down version of Research In Motion's popular BlackBerry Messenger service could arrive next month as an iOS app. Good move?

Looking for a way to message your smartphone touting buddies, but avoid those pricey messaging fees? WhatsApp Messenger, with its variety of messaging features just may fit the bill. Find out how it stacks up against the rest in our in-depth review...