Elon Musk is willing to build his own smartphone if Apple decides to kick Twitter out of its App Store. 

Musk wrote in a Friday tweet he would "make an alternative phone" to compete with Apple's iPhone if the tech giant ends up blocking Twitter from its powerful App Store.

Since taking over Twitter at the end of October, Musk has made a plethora of changes to the platform, including mass layoffs and firings of personnel, which have led to the resignations of executives in charge of data privacy and content moderation. Before he offered to acquire Twitter for $44 billion, Musk criticized Twitter for undermining democracy by failing to uphold "free speech principles" and not long before called himself a "free speech absolutist."

Musk's stance on content moderation is to allow speech that does not violate the law. In addition, he is reportedly planning to try and make money for Twitter off of adult content or pornography, similar to the site Only Fans. Under previous leadership like Jack Dorsey, content moderation was more deliberate and focused on "safety" for users, banning pornography, hate speech and violence. Musk has quickly moved to reinstate a number of users banned for such content, like former president Donald Trump.  

Apple has lengthy guidelines for apps.

"When people install an app from the App Store, they want to feel confident that it's safe to do so — that the app doesn't contain upsetting or offensive content," the first rule of the guidelines reads.

Musk did not deny on Friday the possibility that his changes to Twitter could get it kicked out of the App Store, but allowed, "I certainly hope it does not come to that."