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.

Apple released iOS 18.3 to the public today. Because this version changes the number immediately after the decimal, it will offer more significant upgrades than the recently released iOS 18.2.1.