The billionaire and tech giant appear on a collision course for an all-out conflict while concerns grow that the new rules for moderation might run afoul of Apple's guidelines.
Musk said Apple wouldn't tell him why it might be removed from the app store.
Forbes asked for comment from Apple, but they didn't reply.
Since Musk took over the platform last month, the moderation policies have been loosened and he has promised to allow banned accounts to return to the platform.
At one point, Musk asked, "Do they hate free speech in America?", after he criticized Apple on Monday.
Musk has taken issue with the 30% share Apple takes for in-app purchases for apps that make at least $1 million a year through the App Store, and on Monday he suggested he would go to war with Apple rather than pay the fee.
There is a warning against objectionable content at the top of Apple's guidelines for apps in the App Store. Musk said earlier this month that hate speech will be allowed on the site but that it won't be promoted with racist comments. Ford, Pfizer and United Airlines are some of the companies that have cut back on ad spending due to concerns about the future of the micro-messaging service. Parler, a right-wing platform, was suspended by Apple for "dangerous and harmful content" after the January 6 attack on the Capitol. In May 2021, Parler was back in business.
If there is a ban on the App Store and the Play store, Musk will develop an alternative phone.
"Musk vs Apple new battle is not what investors want to see, and will likely cause a further hit to the stock, which has declined almost 50% over the past year."
Parler is back on the app store. There is a 6 ban.
Here are the other companies that are rethinking their ties.
Musk says he will grant "amnesty" for nearly all banned accounts on social media.
Musk says "freedom of speech, but not freedom of reach."