The creator of a Twitter account that was banned on the platform for tracking the movements of Elon Musk’s private jet has taken his jet tracking to Twitter-rival Threads.

Twitter is considering legal action against Meta over its fast-growing rival app Threads.

Threads, which was launched to millions on Wednesday, is similar to Twitter and has been pitched by Meta bosses as a "friendly" alternative.

Twitter's Elon Musk said "competition is fine, cheating is not" - but Meta denied claims in a legal letter that ex-Twitter staff helped create Threads.

More than 30 million people have signed up for the new app, according to Meta.

That is less than a tenth of the estimated 350 million users on Twitter, according to Statista.

Let the battle begin.

Facebook parent Meta Platforms on Wednesday launched Threads, a stand-alone microblogging app that takes direct aim at Twitter as user unrest on that platform has grown since Elon Musk took the company over in October.

Ten million users signed up for Meta's newly launched Threads app in its first seven hours, the company's chief Mark Zuckerberg says.

He pitched the app as a "friendly" rival to Twitter, which was bought by Elon Musk in October.

Experts say Threads could attract Twitter users unhappy with recent changes to the platform.

Threads allows users to post up to 500 characters, and has many features similar to Twitter.

Earlier, Mr Zuckerberg said keeping the platform "friendly... will ultimately be the key to its success".