Apple Inc will host an event on Sept. 10 at the Steve Jobs Theater in the company's Cupertino, California campus, where it is widely expected to unveil new iPhone models.

At the event, Apple is also expected to release new versions of softwares for its gadgets, including watchOS, iPadOS, and the much-anticipated iOS 13.

In an invite to the event on Thursday, Apple teased a five-coloured version of its logo, implying launch of more colours for its new iPhone models.

The company has been in the storm's eye, with trade tensions affecting its manufacturing link to China.

Apple faces levies of 15% imposed by the Trump administration on major products made in China such as smartwatches and wireless headphones on Sept. 1, with a tariff on its biggest seller, the iPhone, to take effect on Dec. 15.

Sales of the iPhone dropped to less than half of the company's total revenue in its latest quarter for the first time in seven years.