> Ik steur je wel even een appje
(I'll send you an message on WhatsApp)
is the norm in The Netherlands. My entire family, extended family, and everyone around them is all on WhatsApp. While I communicate with iMessage/SMS with friends in the US, that's not the case outside of the US. Everyone seems to have WhatsApp, most people don't use Google hangouts or other services alongside that, let alone SMS.