iOS 27.3 Beta 1 Restores Redesigned Health App

• iOS 27.3 Beta 1 is now available to developers, with public beta expected soon.
• Build 24C5037i has a download size around 10GB, varying by iPhone model and software version.
• The update restores the redesigned Health app first seen in an iOS 27.2 beta.

iOS 27.3 Beta 1 brings back Apple’s redesigned Health app, which was first introduced during the iOS 27.2 beta testing period. Apple has now made the first iOS 27.3 developer beta available, giving developers an early look at the returning design and several other changes.

The beta is currently for developers, while a public beta is expected soon. Its build number is 24C5037i, and the download is around 10GB, although the size can vary based on the iPhone model and the software version already installed. This is a test release, not the stable update for all users.

Redesigned Health App Returns

The redesigned Health app, which first appeared in an iOS 27.2 beta, returns with iOS 27.3 Beta 1. The update also includes a modem firmware update and improved Siri AI capabilities that allow users to perform actions within apps.

The beta also includes a modem firmware update. Apple has not shared further modem-related details in the information reported with this release, so the change should not be taken as confirmation of a particular network improvement.

Other Changes in the Update

Alongside the Health app redesign, the beta lists several changes across Apple’s software experience. These include Siri AI in-app actions, Adaptive dark mode, vertical tabs in Safari, limited Apple Intelligence features in China and more StandBy customisation.

These details reflect the features reported in the first beta. Apple may adjust or expand them during the testing cycle. The presence of a feature in a developer beta does not by itself confirm its final availability, regional reach or exact behaviour in the stable release.

Build Number and Download Size

The first developer beta uses build number 24C5037i. The update is approximately 10GB, but the displayed download size can differ between iPhone models and depending on which iOS version is currently installed. Keep enough free storage available before starting the installation.

Apple has made the developer beta available now. A public beta is expected soon, but no specific public beta date is confirmed here. Users who are not testing software should wait for a stable release rather than installing a developer beta on their main iPhone.

How to Download the Developer Beta

Developers who want to test the release can check the beta update setting on their iPhone. Before installing any beta software, back up important data. Early test versions may have bugs or unexpected behaviour, so a backup helps protect personal information if an issue occurs.

• 📱 Open the Settings app on your iPhone.
• ⚙️ Tap General.
• 🔄 Select Software Update.
• 🧪 Tap Beta Updates.
• 👨‍💻 Choose iOS 27 Developer Beta to enable developer beta updates.
• 📥 Return to the Software Update screen and check for iOS 27.3 Beta 1.
• 📶 Use Wi-Fi to download the update and back up your important data before installing the beta.

If the beta does not appear, check that Beta Updates is enabled for the developer testing channel and try again later. Availability can depend on the beta account and device setup. A public beta is expected soon, but its timing has not been confirmed.

MobileTelco has also covered the iOS 27.2 Release Candidate for iPhone and the iOS 27.0.1 update with iPhone 18 Pro fixes.

Conclusion

iOS 27.3 Beta 1 brings back the redesigned Health app and includes several other reported changes, including a modem firmware update, Siri AI in-app actions and Safari adjustments. The developer beta is available now with build 24C5037i and an approximately 10GB download. A public beta is expected soon, but no timing has been confirmed. Back up your iPhone and use Wi-Fi before installing the test software.

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