According to The Information, Twitter is planning to hike the price of its verified membership option for iPhone users who pay through the app.

Twitter Blue costs $7.99 per month, according to the company’s website. This may change for certain customers, as Twitter plans to charge $11 for payments made through its iPhone app, according to a source familiar with the issue.

Meanwhile, Twitter has suggested charging customers who pay for Blue via the service $7 per month, according to the outlet. The difference in price between utilizing an Apple iPhone and the Twitter website to pay for the subscription function is $4.

According to the article, the price increases are likely in response to Apple’s 30% charge on in-app purchases made through its App Store.

Twitter and Apple did not immediately reply to Insider’s requests for comment.

Musk recently chastised Apple’s App Store restrictions, accusing the company of suppressing free expression and monopolizing the industry. He further claimed that Apple threatened to remove Twitter from its app store.

Musk claimed he visited with Apple CEO Tim Cook at Apple’s California headquarters two days after declaring “war” on the company and settled a “misunderstanding” via Twitter. Musk stated that Cook stated unequivocally that Apple never contemplated deleting Twitter from the App Store.

According to internal communications obtained by The New York Times, Twitter first debuted Blue in early November, but it was canceled and postponed until after the midterm elections. Later, Twitter attempted to reintroduce Blue with gray checkmarks but stopped it due to impersonation difficulties.

Musk announced on November 25 that Twitter would likely release Blue on December 2. Platformer stated that the rollout was delayed because Twitter was attempting to avoid App Store costs.