"Apple has also threatened to withhold Twitter from its App Store, but won't tell us why," Musk tweeted, providing a reason for his recent criticism. .
Apple did not immediately respond to Insider's request for comment on Musk's tweets
Musk also knocked the 30% fee that Apple takes from most sales through the company's App Store, tweeting a photo of a highway sign with two options: "Pay 30%" or "go to war," with a car choosing the "go to war" path.