[alex-robbins]

WhatsApp is closed source. They could backdoor it if they wanted to (or were forced to).

[AutistiCoder]

sure, but

a) that would involve changing the code base b) more privacy minded users would just delete the messages or not update.

[bitpush]

And so in Apple and iOS. What is your point?

[IshKebab]

His point was that it is technically possible for WhatsApp to add a backdoor. Apple could too.