Apple has been gradually introducing AI features to its products, starting last year in the US.
Investors have been hoping this will re-ignite sales, which have slowed as customers hold onto their phones and other products for longer.
Mr Cook said Apple had seen a record number of purchases of new iPhones from people who already own older iPhones.
He said Apple was expecting to push out the AI features to more languages in April.
The company said overall sales rose 4% to $124.3bn, lifted by a jump in its computer sales and strong growth in its services business, which includes Apple TV, Apple News and Apple Pay.
Profits rose 7% year-on-year to $36.3bn.
Emarketer analyst Jacob Bourne said Apple was going to have to have to speed up the roll-out and start looking at new kinds of products to maintain its edge.
“The results show Apple can still execute, but the next few quarters will test whether it can balance its cautious approach with the market’s hunger for AI innovation,” he said.
https://www.bbc.com/news/articles/cn57l2nreglo,
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