Apple has issued iOS 18.3, fixing 29 flaws, one of which is already being used in real-life attacks on iPhones. Here's what you need to know.

Apple posted iOS 18 adoption rates on Friday, which are only slightly different from the numbers for iOS 17 a year ago. The company says iOS 18 has been installed on 68 percent of all iPhones (as of January 21) and 76 percent of models from the last four years.

OS 18 adoption is on pace with iOS 17 adoption last year, according to iOS 18 adoption statistics provided by Apple. iOS 18 is installed on