I really enjoyed this article about WhatsApp because I’ve had this particular app for a few years, and I’m still currently using it as well. However just to bring it to your attention about this app, is that there are and have been a few upgrades or changes to this app. Like it was mentioned about the calling options, now you have to earn points which helps with being able to make international calls. It’s just a slight difference but you can still use the calling option.