iOS and Android Whatsapp users are not required to update their software to receive the new feature, as it is being rolled out ‘over-the-air’, meaning some users will receive the blue ticks before others.
“Our principles will not change. Everything that has made WhatsApp the leader in personal messaging will still be in place. Speculation to the contrary isn’t just baseless and unfounded, it’s irresponsible. It has the effect of scaring people into thinking we’re suddenly collecting all kinds of new data. That’s just not true, and it’s important to us that you know that.
Zuckerberg explains WhatsApp acquisition