Twitter owner Elon Musk has opened fire against Apple over its tight control of what is allowed on the App Store, saying the iPhone maker has threatened to oust his recently acquired social media platform.

Mr Musk also joined the chorus crying foul over a 30% fee Apple collects on transactions via its App Store - the sole gateway for applications to get onto its billion plus mobile devices.

A series of tweets fired off by Mr Musk included a meme of a car with his first name on it veering onto a highway off-ramp labeled "Go to War," instead of continuing onwards towards "Pay 30%".

The billionaire CEO also tweeted that Apple has "threatened to withhold Twitter from its App Store, but won't tell us why".

"This is a battle for the future of civilization. If free speech is lost even in America, tyranny is all that lies ahead," he added in a tweet overnight.

Apple did not immediately reply to a request for comment.

Both Apple and Google require social networking services on their app stores to have effective systems for moderating harmful or abusive content.

But since taking over Twitter last month, Mr Musk has cut around half of Twitter's workforce, including many employees tasked with fighting disinformation, while an unknown number of others have voluntarily quit.

He has also reinstated previously banned accounts, including that of former president Donald Trump.

Yoel Roth, the former head of trust and safety at Twitter who left after Mr Musk took over, wrote in a New York Times op-ed that "failure to adhere to Apple's and Google's guidelines would be catastrophic," and risk "expulsion from their app stores".

Describing himself as a "free speech absolutist," Mr Musk believes that all content permitted by law should be allowed on Twitter, and yesterday described his actions as a "revolution against online censorship in America".

He also tweeted that he planned to publish "Twitter Files on free speech suppression," but without clarifying what data he had in mind to share with the public.

Though Mr Musk says Twitter is seeing record high engagement with him at the helm, his approach has startled the company's major moneymaker -- advertisers.

In recent weeks, half of Twitter's top 100 advertisers have announced they are suspending or have otherwise "seemingly stopped advertising on Twitter", an analysis conducted by nonprofit watchdog group Media Matters found.

Mr Musk yesterday accused Apple of also having "mostly stopped advertising on Twitter".

"Do they hate free speech in America?" he asked, before replying with a tweet tagging Apple CEO Tim Cook.

In the first three months of 2022, Apple was the top advertiser on Twitter, spending some $48m on ads that accounted for more than 4% of the social media platform's revenue, according to a Washington Post report citing an internal Twitter document.

Sarah Roberts, an information studies expert at University of California, Los Angeles, said that "Musk didn't understand that Twitter itself was a brand, had cachet".

"Now companies don't even want to be associated with it. It's not even that they worry about the content. Twitter is a tainted brand, a brand non grata companies don't want to be associated with," she added.