There are lots of instant messaging applications for Android, Skype, Kik, Facebook Messenger, Viber... and so on. One of the most popular ones, if not the most popular one, is Whatsapp, for sure. Whatsapp passed the magic 500 million monthly active users four months ago, which is amazing when you think about it. As if that wasn't enough, Whatsapp now has 600 million monthly active users, company's CEO Jan Koum announced on Twitter recently. This is staggering, they managed to get 100 million monthly active users in just four months and we're talking about a company that is only about five years old. These number would actually be incredible even if they had 600 million registered users, but we're talking active users here. Unfortunately Mr. Koum didn't let us know how many registered users Whatsapp has nor did he share other stats with the public, such as how many messages, photos, etc. are share on Whatsapp on a daily basis. The number of registered users on Whatsapp is certainly a lot higher than the one mentioned, who knows, maybe Whatsapp already crossed the 1 billion registered users threshold.
As a side note, Whatsapp is one of the three non-Google applications on the Google Play Store which have over 500 million downloads at this point. All three of those applications belong to Facebook, Facebook app, Messenger app and Whatsapp. Messenger actually crossed that threshold quite recently after they started pushing people to install it as a separate application in order to use Facebook's chatting capabilities, which of course upset a lot of people while making a lot of them share that with us online, the reasons were really over the top. Whatsapp is available on a wide array of devices / operating systems, it's available for Android, iOS, Windows Phone, Blackberry and Nokia S60 and S40 devices. Interesting enough I used Whatsapp only for a short while, it never really appealed to me, besides not many people I know use it. How about you, do you use Whatsapp and do you use it regularly? If not, which instant messaging service / application do you prefer and why is that?