iOS 27.3 beta is out with the Health app back and Siri AI in more apps

Apple released the first iOS 27.3 beta to developers on November 3, 2026 (build 24C5037i). Apple’s developer post confirms the release and asks developers to build and test their apps with Xcode 27.3.

Here’s what’s new and what you should know before you install it.

Siri AI can do more, but with daily limits

Siri AI now works across many more of Apple’s own apps. According to Apple’s Siri AI developer post, the new actions cover Calendar, Files, Finder, Journal, Mail, Maps, Messages, Music, Notes, Photos, Preview, Reminders, Safari, Shortcuts, and Weather. For example, you can ask Siri to find a coffee shop you visited last week, or to archive files you haven’t opened in over a year.

The beta also adds two Mail actions: one unsubscribes you from mailing lists, and the other undoes a sent message. Apple hasn’t mentioned these in its posts, so they may not make it to the final release.

There’s a catch, though. A footnote from Apple says Siri AI and other server-based features come with daily usage limits, and that expanded access will be a paid option later. Apple hasn’t said what those limits are or what the upgrade will cost.

In this beta, Siri AI supports English, French, Japanese, Korean, Portuguese, and Spanish, and now adds Traditional Chinese, Norwegian, Turkish, and Vietnamese, the four languages Apple had said were coming by the end of the year. That brings the total to 10 languages. Siri AI is also not available in the EU on iOS, iPadOS, or watchOS.

The redesigned Health app is back, but Health Age needs an Apple Watch

The redesigned Health app is available in the iOS 27.3 developer beta starting today, and Apple says it will reach everyone as a free update later this year. It also supports more languages this time, not just U.S. English.

The redesign is built around three main sections:

• Insights gives you a daily summary based on your Activity Rings, heart rate, sleep, and vitals.
• Longevity tracks seven areas of your health, from heart health to hearing.
• Health Age compares your health data with your actual age. It uses Apple Watch readings such as VO2 max, resting heart rate, sleep, and heart rate variability.

Because Health Age relies on Watch data, Apple confirms it requires an Apple Watch. If you only have an iPhone, you won’t get this score. The redesigned app as a whole also needs an iPhone or iPad that supports Apple Intelligence.

Apple has also added movement checks you can do at home using your iPhone camera and Apple Watch. Apple says the video is processed on your device and is never recorded, stored, or shared.

This isn’t the first time we’ve seen the new Health app. Apple first added it in iOS 27.2 beta 1, removed it in beta 4, and then shipped iOS 27.2 without it. Since beta features can be pulled again, it’s best not to count on the new Health app until it actually ships.

Apple Intelligence comes to China in December

In a Chinese-language newsroom post dated October 31, Apple said Apple Intelligence features would open for testing in China on November 4 with the latest iOS developer beta. Regular users in China will get them when iOS 27.3 launches in December.

The first batch of features includes Live Translation, Clean Up, Writing Tools, Visual Intelligence, and Genmoji. Siri AI is not part of this launch.

To use these features, you’ll need one of these iPhones:

• iPhone 16 or later
• iPhone Duo
• iPhone 15 Pro or iPhone 15 Pro Max
• iPhone Air

Your device language and Siri language also need to be set to English or Simplified Chinese.

In China, parts of Siri, Writing Tools, and Visual Intelligence are powered by Alibaba’s Qwen model. To learn more about why Siri AI is missing, read Apple Intelligence in China without Siri AI.

Other changes in the beta

The beta also brings several smaller updates:

• Safari: You can now use vertical tabs (turn them on in Safari settings). There’s also a new Adaptive Dark Mode that darkens websites that don’t have their own dark theme.
• StandBy: StandBy features that started on the iPhone Duo are now available on every iPhone running iOS 27, along with more clock face options.
• Fitness+: A new Gym Strength program creates a four-week workout plan based on your goals, experience, schedule, and available equipment.
• Apple Watch: Live Rewind and Siri Recap need iOS 27.3 on your paired iPhone. You can turn them on in the Watch app.
• Control Center: The VPN toggle now lets you switch between different VPNs.

Changes for iPhone Duo owners and developers

If you have an iPhone Duo, you can now swipe in from the left or right edge of the outer display to bring content down within reach of your thumb. To turn it on, go to Settings > Accessibility > Touch.

The bigger news is for app developers. Through a new Developer Preview, any developer can now connect their app to Siri AI using App Intents. Apple says these apps will reach users “in a few months,” and App Store submissions will open in the spring.

Only the developer beta is out for now

If you want to try it, open Settings > General > Software Update. Under Beta Updates, choose iOS 27 Developer Beta. Apple hasn’t announced a public beta yet. For the full walkthrough, see how to install the iOS 27 developer beta on iPhone.

Apple’s China page says iOS 27.3 will launch in December, but there’s no exact date. Until then, anything in the beta could change, just like the Health app did last time.