I don't think I've used a smartphone-era chat app with more caveats before Whatsapp. Was message syncing really not something to take for granted? iMessage does its job without me having to think about it, except that it's not as reliable as I'd expect, which has led to a couple of real-world "two generals" problems.Still the best option for cross-platform communication, fluid UI and user base. Hate it or not WhatsApp is number 1 and iMessage could take a few tips.
Of course, Whatsapp is number 1 worldwide. It's cross-platform, everyone can use it, and in many places people just have a smartphone (no iPad or PC). Jan Koum, Whatsapp cofounder who left FB's board in protest while leaving $1B in unvested stock behind, provided the inspiration for my own project.
Last edited: