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A difference is you don't have to create a WhatsApp account, it just uses your phone number. It is plug and play.

• yohanatan 13y ago
  Trivial to implement.
  • roel_v 13y ago
    Yes, everything about WhatsApp is so trivial that Facebook with their billions and billionaires and 1000's of high-quality engineers decided to spend 18 Billion dollars on it. But of course they're all dumbasses because you say it's all 'trivial', right?
    • yohanatan 13y ago
      I think it's pretty clear that Facebook didn't buy WhatsApp for the technology itself but rather the large market penetration/installed user base. Whether that was stupid or not is up for debate.