iOS 18.4, which Apple released Monday, brings several significant new features to iPhones. It is one of the biggest updates to the operating system since the initial public release of iOS 18 in September 2024.

Among other things, the update will also introduce a key Apple Intelligence feature that Apple showcased at WWDC24. Keep reading to learn about all the new features in iOS 18.4 — or watch our video. (Apple also released iPadOS 18.4, macOS Sequoia 15.4 and visionOS 2.4, which include similar upgrades, on Monday.)

ChatGPT and Google Gemini are quickly becoming popular tools for tasks ranging from research to brainstorming. And ChatGPT will even be baked into Apple Intelligence later this year. If you’re looking for an intro to these ever-evolving AI tools, you can catch up with the latest developments with this comprehensive artificial intelligence certification course bundle.

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Apple seeded second release candidates of iOS 18.4 and iPadOS 18.4 on Friday, a day after releasing a second release candidate for macOS 15.4. These follow-up releases likely do nothing but fix bugs discovered in the first release candidates of these operating systems, which Apple released Monday.

When the final versions go live sometime in April, the OS updates will give millions of people around the world their first access to Apple Intelligence (and bring other improvements to boot). But they won’t include the much-anticipated smarter version of Siri that Apple promised last year.

A new video potentially gives us our first look at the massive iOS 19 redesign that Apple reportedly will unveil this June at WWDC25.

As previous rumors indicated, the next major iOS upgrade supposedly will take inspiration from the Vision Pro’s visionOS, integrating many of its design elements.

iOS 18.4 will be one of Apple’s biggest updates to iOS 18 since the operating system’s public release last September. It will pack plenty of changes and improvements, like a Vision Pro app, Apple News+ Food and new emoji.

That all sounds great, but these are the five iOS 18.4 features that I am most excited about.

Assassin’s Creed Shadows finally launched on Thursday, and Mac gamers can play the action-packed, role-playing game from Ubisoft at the same time as players on PCs and consoles. Mac owners won’t face the usual wait of months or years. There’s even a version for iPads with M-series processors in development.

The adventure is set in medieval Japan, and players can choose either a samurai or a shinobi (aka ninja) for very different gaming experiences.

An Apple reorganization reportedly brings new management to the team struggling to develop an AI-enhanced version of Siri. Apple apparently tapped Mike Rockwell, an exec with one successful Apple product launch already under his belt, to shepherd the promised Siri upgrade.

Clearly, the goal is to accelerate a project that’s been significantly delayed — and has become a major embarrassment for Apple.

The head of the team developing the promised AI-enhanced Siri had to admit the recent decision to significantly delay the release gave Apple’s reputation a major black eye, according to a report published Friday.

Robby Walker, Apple’s senior director of Siri and information intelligence, reportedly called the delay “ugly” during a recent all-hands meeting with his team. He gave an update on how close Apple is to having the technology ready, but couldn’t promise when it will ship. At present, the “smarter” Siri reportedly still fails to work correctly a significant percentage of the time.

Apple reportedly will add a live translation feature to AirPods in iOS 19 that will enable real-time conversations between people who speak different languages.

The feature will come alongside Apple “bolstering the translation technology in iOS 19.” With this advancement, Apple is set to compete with other ai translation earbuds, bringing seamless multilingual communication to AirPods. Learn more about the update here.

Apple intends to massively transform the user interfaces for the iPhone, Mac and iPad later this year, according to a reliable source who says iOS 19, macOS 16 and iPadOS 19 could bring the most significant changes in years.

How will those changes affect the familiar look and feel of Apple’s devices? A software developer speculates that a pair of recently released Apple apps offer a sneak peek at the design overhaul reportedly coming in iOS 19 and macOS 16.