Just upgraded my iPhone 4 to Nexus 4, and could not find on Google a reasonable answer to this question. Is there any good app that does this? Or, what should be the process?
there is no simple way of doing so, you have to do a lot of technical mumble-jumble for this.
Caution :: Do not install whatsapp on your android device beforehand.
if you are ready then:
[I have not tried this with MAC, this works fine in PC(Win) and Linux]