iOS 27.3 Public Beta Is Live: What's New & How to Install
iOS 27.3 Public Beta Is Live: What's New & How to Install
Updated: November 6, 2026. Apple seeded the first iOS 27.3 public beta on Thursday, November 5, 2026 — two days after the developer beta landed on November 3. The build is 24C5037i, identical to the developer beta, so developers and everyday testers are now running the exact same software. Anyone can install it for free through Apple's Beta Software Program, and the final public release is expected in December 2026.
This is a different story from the developer beta we covered on November 4: that one was for registered developers only. The public beta opens iOS 27.3 to every iPhone owner who signs up. Here is what is in it, which iPhones actually get the headline features, and how to install it — plus when to wait instead.
The redesigned Health app is back
The headline feature is the redesigned Health app. Apple unveiled it at its September 9, 2026 iPhone event, it briefly appeared during iOS 27.2 testing, and Apple pulled it in iOS 27.2 beta 4 (October 13) so it could ship 27.2 on time. It never made it into the final iOS 27.2 release on October 26. In iOS 27.3 it is back — and this time Apple says it ships with the final release before the end of the year.
The redesign is built around two new tabs:
- Insights tab: AI-powered summaries throughout the day, drawing on heart data, sleep scores, activity trends, cycle tracking, and vitals. The summaries are written in natural language by Apple Intelligence running on-device, with heavier work routed to Apple's Private Cloud Compute.
- Longevity tab: long-term wellness across seven areas — heart health, sleep, mental wellbeing, movement, metabolic health, hearing, and nutrition. Nested inside is Health Age, which uses Apple Watch data (VO2 max estimate, resting heart rate, sleep duration, heart rate variability) to show how your health metrics compare with what is typical for your age. You can also add clinical lab data such as A1c and LDL cholesterol.
Also new in this release: at-home movement evaluations that use the iPhone camera and Apple Watch together to measure flexibility, strength, balance, movement mechanics, and VO2 max, with real-time audio and visual feedback. Apple says the feature runs entirely on-device — no video is recorded, stored, or shared. The redesigned app now supports 11 languages, including English, Chinese, French, Japanese, Korean, Portuguese, Spanish, Turkish, and Vietnamese.
The catch — not every iPhone gets it. The redesigned Health app, including Insights, Health Age, and the Longevity tab, requires an Apple Intelligence-compatible iPhone: iPhone 15 Pro, iPhone 15 Pro Max, or any iPhone 16, 17, or 18 model. Standard iPhone 15, iPhone 14, iPhone 13, and older models will not get these AI features, even after the final public release. The other iOS 27.3 changes — Safari tabs, StandBy, Siri AI actions — are available more broadly.
One honest note on Health Age: it is a wellness trend indicator, not a medical measurement. Apple Watch VO2 max estimates carry roughly 13% mean error compared with clinical laboratory testing, according to a May 2025 validation study published in PLOS ONE. Apple says the same in the app's footnotes. Treat Health Age as a directional score, not a diagnosis.
Safari: vertical tabs and Adaptive Dark Mode
Safari gets two long-requested changes in iOS 27.3:
- Vertical Tabs: move your open tabs from the horizontal strip to a sidebar running down one side of the screen. To turn it on, go to Settings > Apps > Safari > Vertical Tabs.
- Adaptive Dark Mode: Safari dynamically darkens websites that do not include their own dark theme, so dark rendering stays consistent across the web — not just on sites whose developers built one.
Both features arrive simultaneously on iPhone, iPad, and Mac through the companion macOS Golden Gate 27.3 public beta, which also brings Live Activities to Macs without a Dynamic Island.
Siri AI: four new languages, more actions
Siri AI — the rebuilt conversational assistant Apple introduced with iOS 27 — expands in iOS 27.3 to support Traditional Chinese, Norwegian, Turkish, and Vietnamese, joining the five languages added in iOS 27.2 (French, Japanese, Korean, Portuguese, and Spanish). That brings the total to nine languages.
The update also opens new actions inside Apple's own apps. You can now ask Siri to make and save a playlist, schedule an iMessage to send later, or create a Journal entry. Developers can build Siri AI actions for their own apps through App Intents — the Siri AI Developer Preview is now open to all developers, with App Store submissions for these integrations expected to open in spring 2027. Apple has also confirmed that Siri AI is not available for users under 13 anywhere it is offered.
iPhone Duo, StandBy, Music, and Fitness+
For owners of the iPhone Duo, Apple's foldable that launched in October 2026, iOS 27.3 adds Reachability: it shifts the unfolded display's content toward the left or right side so you can reach on-screen elements with one thumb. Turn it on in Settings > Accessibility > Reachability.
Elsewhere in the update:
- StandBy: the more customizable clock faces that debuted with the iPhone Duo now extend to all iPhones — new color themes and complication slots.
- Apple Music: a new Selfie Sing feature.
- Apple Fitness+: Gym Strength builds a four-week personalized lifting plan around your goals and the gym equipment you have, progressing week by week.
- Apple Watch Series 12 and Ultra 4: Audio Intelligence features Live Rewind (a transcript of the last 15 seconds of speech) and Siri Recap (a high-level summary of the day's conversations) are available for testing in watchOS 27.3.
Apple Intelligence reaches China in December
Apple announced on October 31 that the first Apple Intelligence features reach mainland China with iOS 27.3 in December, with Alibaba Qwen powering parts of Siri, Writing Tools, and Visual Intelligence. The rebuilt Siri AI assistant itself is not included in the China rollout. Like the language expansion in iOS 27.2, Siri AI remains unavailable in the EU and mainland China.
Companion betas and build numbers
Apple pushed public betas for the whole lineup on the same day, November 5 — the most broadly synchronized beta wave of the iOS 27 cycle:
| Software | Build |
|---|---|
| iOS 27.3 & iPadOS 27.3 Beta 1 | 24C5037i |
| macOS Golden Gate 27.3 Beta 1 | 26C5035r |
| tvOS 27.3 Beta 1 | 24K5286g |
| watchOS 27.3 Beta 1 | 24S5284h |
| visionOS 27.3 Beta 1 | 24N5286r |
iOS 27.3 is expected to be the last major iOS release of 2026, with the final public version anticipated before the end of the year — most likely in December. Apple has not announced a specific date. The compressed timeline is a knock-on effect of this cycle: Apple skipped iOS 27.1 for most iPhones (it shipped only for the Duo) and went straight to iOS 27.2, pulling the whole .3 schedule forward by roughly a month.
How to install iOS 27.3 public beta 1
The beta is free. Four steps:
- Back up your iPhone to iCloud or your Mac first. Public betas are pre-release software and carry a real risk of crashes, battery drain, and app incompatibilities. Apple recommends against installing a public beta on a primary device.
- Sign up for the free Apple Beta Software Program at beta.apple.com, using the same Apple Account you use on your iPhone.
- On your iPhone, go to Settings > General > Software Update > Beta Updates and select iOS 27 Public Beta.
- Return to Software Update. When iOS 27.3 appears, tap Update Now and follow the prompts. If you are already enrolled in the public beta program, check Software Update directly — the update should appear without re-enrollment.
Should you install it — or wait for December?
Install it if you want the new Health app, Safari vertical tabs, or the Siri AI additions now, and you accept beta software on a secondary device or with a fresh backup in place. The public beta is the same build developers have been testing since November 3, so the worst early surprises are already known — and Apple's beta notes list only two known issues, both developer-facing.
Wait if this is your only iPhone, you depend on it for work, or you only care about the Health app: it was pulled from iOS 27.2 once before, so nothing is guaranteed until the final release ships in December. The stable iOS 27.2 you are already on is the safe choice — and if you are still on iOS 27.0.1, update to 27.2 first and let 27.3 come to you.
For traders and buyers: a beta is not a reason to change a phone's price. If you are buying a used iPhone, check that it is not running a beta profile — and run our used-iPhone checklist and a free IMEI check before you pay.
FAQ
When did the iOS 27.3 public beta come out?
Thursday, November 5, 2026. It is build 24C5037i — the same build Apple seeded to developers on November 3, 2026. The final public release is expected in December 2026; Apple has not announced an exact date.
What is new in iOS 27.3 public beta 1?
The redesigned Health app returns with an Insights tab, a Longevity tab, and Health Age; Safari gains vertical tabs and Adaptive Dark Mode; Siri AI adds four languages (Traditional Chinese, Norwegian, Turkish, Vietnamese) and new actions in Apple apps; iPhone Duo gets Reachability; StandBy clock faces extend to all iPhones; Apple Fitness+ adds Gym Strength; Apple Watch gets Live Rewind and Siri Recap.
Does the redesigned Health app work on my iPhone?
Only on Apple Intelligence-compatible iPhones: iPhone 15 Pro, iPhone 15 Pro Max, or any iPhone 16, 17, or 18 model. Standard iPhone 15, iPhone 14, iPhone 13, and older models will not get Insights, Health Age, or the Longevity tab, even after the final release. Other iOS 27.3 changes — Safari vertical tabs, Siri AI languages, StandBy — remain available on all iPhones able to run iOS 27.
How do I install the iOS 27.3 public beta?
Back up your iPhone, sign up free at beta.apple.com with the same Apple Account, then go to Settings > General > Software Update > Beta Updates and select iOS 27 Public Beta. When iOS 27.3 appears, tap Update Now.
Is the iOS 27.3 public beta safe to install?
It is pre-release software, so expect bugs — Apple recommends against installing it on a primary device and advises keeping a full backup. The build is the same one developers have tested since November 3, and Apple's notes list only two known issues, both developer-facing. If you want stability, wait for the final release expected in December.
Will iOS 27.3 come to the iPhone Duo?
Yes. iOS 27.3 is available for all iPhones able to run iOS 27, including the iPhone Duo — which also gains Reachability for one-handed use of its unfolded display in this update.
Bottom line
iOS 27.3 public beta 1 is the update iOS 27.2 was supposed to include: the redesigned Health app is back, Safari finally gets vertical tabs and a real dark mode, and Siri AI speaks four more languages and does more inside Apple's apps. It is free, it is the same build developers have had since November 3, and the final version lands in December. If you have an Apple Intelligence iPhone and a backup, it is worth trying today. Everyone else — especially anyone on a primary device — can wait a few weeks and get the same features without the beta risk.
Last updated: November 6, 2026. Sources: 9to5Mac (November 5, 2026), MacRumors (November 5, 2026), TechTimes (November 5, 2026). Build numbers: iOS/iPadOS 27.3 beta 1 — 24C5037i; macOS Golden Gate 27.3 — 26C5035r; tvOS 27.3 — 24K5286g; watchOS 27.3 — 24S5284h; visionOS 27.3 — 24N5286r.
