Nobody I know uses whatsapp.
Everyone has this thing called a phone they run whatsapp on, I assume you can ask for this weird old thing called a phone number.
I will double check, but I think the setup and configuration is already complete for most people's phones, so no additional install needed.
Texts are pricey. Calls are inconvenient. Whatsapp is a de facto standard and I bet a big % of people who got a smartphone, got it because they needed it to use whatsapp, or use whatsapp exclusively.
I will double check, but I think the setup and configuration is already complete for most people's phones, so no additional install needed.