Cook addressed analyst questions about the Apple Watch, saying the company is happy with sales and remains "very committed to it and believe . . . over time it will be even larger." Apple doesn't break out sales numbers for its wearable, but analysts expected to see more growth from that part of Apple's business as competitors leave the smartwatch market.
And analysts are upbeat about Apple's ability to bounce back, thanks to the company's reputation and customer loyalty.
"We're bullish on the iPhone 8 for three reasons: Apple's ecosystem stickiness, the expected upgradability of the device, and teenage fondness of Apple devices," said Clement Thibault, a senior investing analyst with Investing.com.
Meanwhile, Apple is also facing increased competition in its growing Mac business. Microsoft announced Tuesday morning a sleek new laptop aimed at students that is designed to compete directly with the MacBook Air.
Sales of the iPad continued to slide.
The company also increased the size of its share dividend and buyback programs to $300 billion through March 2019. Apple's stockpile of cash is nearly US$260 billion, which - as The Washington Post reported - is more than the gross domestic product of Jamaica and Finland combined.
The main bright spot for Apple continues to be in its services. The App Store, iTunes and other subscription products generated US$7b, up 18 per cent from the previous year.
Apple faces stiff competition from Samsung but is in a strong enough position to weather a weaker quarter - as long as it delivers on the promise of the iPhone 8, said Thomas Cooke, a professor at Georgetown University's McDonough School of Business.
"This is acceptable, considering the environment and that they have new products in the pipeline. That people are holding onto their phones a little longer than expected shouldn't be so alarming," he said.