I understand that there are other chat protocols available on modern smartphones, plenty of them. However, I believe you're not looking at the whole picture, we are different in many ways such as: available on mobile phones only our interface looks a lot better and is easier to use social components bring a real close-friend network to your phone message delivery receipts (sent/delivered/read) posting of status messages onto Facebook and Twitter much more... This is really just the beginning of a 20 page list, but I'm only allowed to reveal the first paragraph