"Using peer pressure and bullying as a way to sell products is disingenuous for a company that has humanity and equity as a core part of its marketing. The standards exist today to fix this," he said in a tweet.
A report in The Wall Street Journal over the last weekend also highlighted this issue.
Apple did consider making iMessage available on Android to attract more users, but concluded that doing so would "hurt us more than help us".
"iMessage on Android would simply serve to remove (an) obstacle to iPhone families giving their kids Android phones," Apple's Senior Vice President of Software Engineering, Craig Federighi, said recently.