Apple has released the first developer beta of iOS 27.3, eight days after iOS 27.2 shipped. Its headline change is the return of the redesigned Health app, which appeared during iOS 27.2 testing but was pulled before release. The beta also brings Apple Intelligence to China and adds several developer-facing changes. Apple’s release notes also list a known Siri privacy-related bug. Apple says iOS 27.3 is due in December 2026 but has not given an exact date. The source’s advice for most users is to skip this first beta and wait for later builds.
What you need to know
- iOS 27.3 beta 1 (build 24C5037i) is available to registered developers now. A public beta is expected later.
- The redesigned Health app is back in testing, with Health Age, Longevity, Readiness, Insights and Quest Diagnostics integration. Availability varies by region.
- Apple lists a known issue in which Siri may show app information without first asking the user to unlock the iPhone.
- Apple says iOS 27.3 will be released in December 2026. The exact date has not been announced.
iOS 27.3 beta 1 in the iPhone Settings app
Betas for the whole Apple ecosystem
The first beta is available to registered developers now. A public beta for members of Apple’s testing program is expected later.
Apple updated its other operating systems at the same time. The following are now in testing:
- iOS 27.3 beta 1, build 24C5037i
- iPadOS 27.3 beta 1, build 24C5037i
- macOS 27.3 Golden Gate beta 1
- watchOS 27.3 beta 1
- tvOS 27.3 beta 1
- visionOS 27.3 beta 1
The source does not give build numbers for the other platforms because it could not confirm them.
According to the source, iOS 27.3 may be the last major iPhone update of 2026. Apple has already confirmed a December release, which leaves little testing time. The company now has to finish features that missed earlier versions.
The redesigned Health app returns
The most visible change involves the Health app. Apple first showed a redesigned version during iOS 27.2 testing. It then restored the old interface in the fourth beta, so the redesign did not ship with iOS 27.2.
The redesigned Health app returns in iOS 27.3
Testers can use the new Health app again. It has a reworked interface and additional tools for analyzing health metrics. Previously announced features include:
- Health Age: an estimate of biological age based on health data
- Longevity: tools related to long-term health indicators
- Readiness: an assessment of how prepared the body is for physical exertion
- Insights: personalized conclusions drawn from collected data
- Quest Diagnostics integration: booking of laboratory tests
Some features depend on the user’s region. Quest Diagnostics, for example, is a US laboratory service and is not available everywhere. The app’s return to beta also does not guarantee that every feature will make it into the final release.
Apple Intelligence arrives in China
The update also launches Apple Intelligence in China. Owners of compatible iPhones there gain tools that reached other countries much earlier. The initial set includes:
- Writing Tools
- Genmoji
- Object removal in photos
- Intelligent notifications
- Visual Intelligence
- Conversation translation
To process some requests, Apple has arranged to use Alibaba’s Qwen AI model.
Shared subscriptions, caller ID and web filtering
Apple’s official iOS 27.3 beta 1 release notes list several less visible changes. Most are technical, and they go beyond bug fixes. Some could eventually affect familiar iPhone features.
Bugs addressed in iOS 27.3 beta 1
One subscription for several people
The App Store now technically supports multi-seat subscriptions. Developers will be able to sell one subscription to several users, and buyers will be able to invite other people. This is separate from Apple’s Family Sharing. The new option lets developers offer their own group plans.
Changes to unknown-caller identification
Apple has refined Live Caller ID Lookup, which lets apps identify callers from unknown numbers. The system now handles additional keys for protected queries automatically. The change mainly concerns the reliability of caller ID services. It does not add a new button in Settings.
Updated web address filtering
Apple has changed NEURLFilter, a mechanism apps can use to check visited websites and restrict access to certain addresses. It updated how protected queries are handled and tightened the setup requirements for such services. Developers of some filtering apps will need to adapt to the new rules.
A known Siri issue
Apple acknowledges that Siri AI is not yet working as intended. In some cases, the assistant may show information from an app without first asking the user to unlock the iPhone. This can happen even when the app’s developer has required that protection. Apple lists the bug as a known issue, and it has not been fixed yet. The source also cautions that the listed changes may not all work immediately after installing the update.
Features that may still arrive
Beyond the changes found so far, the source describes several possible additions to iOS 27.3. One involves the Passwords app. Apple previously promised that the app would be able to change insecure passwords automatically. Today, it warns about compromised and reused passwords, but users usually have to update them manually. The new feature is meant to simplify this on compatible websites and apps.
Apple Watch AI features in iOS 27.3
The second expected addition involves the Apple Watch Series 12 and Apple Watch Ultra 4. Apple is preparing Audio Intelligence for these watches. These sound-processing features are designed to work together with the iPhone.
Launching them requires updates to both watchOS and iOS. As a result, the features may appear in future betas of both systems at the same time. These are expectations, not features that work today. Apple could add them in later builds or postpone them.
How to install the beta, and why you may want to wait
To try the update early, you need an Apple ID registered with Apple’s developer program. According to the source, a paid membership is not required to install betas. The source describes these steps:
- Open Settings on your iPhone.
- Go to General.
- Select Software Update.
- Open Beta Updates.
- Choose iOS 27 Developer Beta.
- Go back, wait for iOS 27.3 beta 1 to appear, and start the installation.
Back up your iPhone before you install. A first beta can contain bugs that affect battery life, notifications and app behavior. The source warns that problems with banking apps would be especially disruptive if the beta is installed on your only iPhone.
When iOS 27.3 will be released
Apple says iOS 27.3 will be released in December 2026 but has not named an exact date. Based on previous years, the source considers mid-December the most likely timing. That is an estimate, not an announcement.
Downloading the first iOS 27.3 beta on an iPhone
According to the source, Apple is also preparing iOS 27.2.1, a smaller update to fix bugs and vulnerabilities in the current stable release. Regular users may therefore receive fixes before iOS 27.3 arrives.
The bottom line
The source author advises against rushing to install the first beta. The returning Health app is interesting, but most other changes either apply only to China or are still in development. The author suggests waiting for later test builds. Those should show which promised features Apple can finish before the end of the year.
