One of the few benefits of WhatsApp is that you can use it to converse with your Android, Blackberry, and iPhone-using friends as well as with other Windows Phone users. But is all this popularity warranted? I have to admit that I'm at a loss to explain it. In fact, the WhatsApp's CEO claimed that it had more users than Twitter-over a quarter billion. So there's a good chance that your iPhone-toting pals will be reachable-even more so now that it's free to install. But among messaging apps intended to save users SMS texting costs, it certainly boasts a huge user base: In fact, WhatsApp peaked at one point as the 6th most popular paid app on the iTunes store, and Onavo (Opens in a new window)ranks it as the eighth most popular social app. I was shocked to read a tech news article recently calling WhatsApp the 'granddaddy' of messaging: I think ICQ would beg to differ. Overly difficult to connect with other users.Shows contacts that aren't available on the service.How to Set Up Two-Factor Authentication.How to Record the Screen on Your Windows PC or Mac.How to Convert YouTube Videos to MP3 Files.How to Save Money on Your Cell Phone Bill.How to Free Up Space on Your iPhone or iPad.How to Block Robotexts and Spam Messages.

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