WhatsApp Now Has More Monthly Active Users Than Facebook App (venturebeat.com)
Facebook's $19 billion bet on WhatsApp in 2014, when the messaging app had 450 million active users, is beginning to pay off. From a report: In recent months, WhatsApp has surpassed Facebook's own marquee app in popularity, according to industry estimates. In September of last year, WhatsApp for the first time had more monthly active users worldwide on Android and iPhone platforms than the Facebook app, research firm App Annie said today in its annual State of Mobile report. App Annie did not share specific figures but told VentureBeat that WhatsApp has maintained its lead over the Facebook app since September.
It doesn't need more features than ICQ to be useful, it just has to be widely available, free, and easy to use.
Whatsapp grew because it did the same thing as SMS but for free (around here you paid per-SMS so this was a massive deal to a lot of people).
No sig today...