iOS 27.3 Beta 1: All New Features Explained

Apple has released the first developer beta of iOS 27.3, expected to ship to everyone in December as the final major iPhone update of 2026. This overview breaks down everything new in beta 1, from AI-powered Siri actions to Apple Watch audio features and Safari upgrades.

■ Siri AI
- Actions across Apple's built-in apps: Calendar, Files, Finder, Journal, Mail, Maps, Messages, Music, Notes and more
- Practical examples such as unsubscribing from mailing lists, adjusting weather notifications, and organizing Safari tabs
- Expanded language support: Traditional Chinese, Vietnamese, Turkish and Norwegian
- Developer preview opening Siri AI integrations to third-party apps

■ Health, Watch and Safari
- Redesigned Health app with insights, guidance and longevity tabs, plus additional supported languages
- Apple Watch Series 12 and Watch Ultra 4: Live Rewind and Siri Recap audio intelligence features
- Safari vertical tab layout and adaptive dark mode

■ Standby, Fitness Plus and other updates
- New Standby clock faces, complication options and shared album photo space
- Reachability support on the iPhone Duo
- Gym Strength workout plans on Fitness Plus, Siri camera mode on iPad, and Apple Intelligence availability in China

iPhone, Apple Watch and iPad owners who want a complete, feature-by-feature rundown before updating will find a concise reference here. It also clarifies which features arrive at launch and which arrive later, helping you decide what to expect from the December release and which settings to check afterward.