The application comes with some really interesting features, like an alert system that will confirm when one of your messages has been sent, delivered, and, most importantly, when it has been read by the recipient.
As you might expect with this type of app, you can create conversation groups with your friends, something that should really come in handy when you're trying to plan a night out or other social event.
You can also send images through the system. All this, without having to pay a cent or put up with irritating ads inside the application.
Kik messenger is an interesting alternative to Whatsapp. It has similar features and an interface that's just as clean and simple.