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Apple iOS 26 Complete Guide | iOS 26.4, New Siri, Gemini Integration, Liquid Glass, and the 2026 Apple Intelligence Rollout

2026-01-21濱本

A complete breakdown of Apple iOS 26. iOS 26.4 (expected March 2026) brings the long-awaited new Siri powered by Google Gemini 3, with screen awareness, personal context, and natural conversation. This article covers the full iOS 26 series, the new Siri in detail, and Apple's AI strategy.

Apple iOS 26 Complete Guide | iOS 26.4, New Siri, Gemini Integration, Liquid Glass, and the 2026 Apple Intelligence Rollout
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This is Hamamoto from TIMEWELL.

In 2026, Apple is at a major inflection point in its AI strategy with iOS 26.

iOS 26.4, expected in March 2026, introduces the long-awaited new Siri — powered by Google's Gemini 3 model. Screen awareness, personal context, and natural conversation are all arriving through a multi-year contract with Google worth approximately $1 billion annually. Apple's approach is characteristically Apple: partner with Google for capability while keeping all processing inside its own Private Cloud Compute infrastructure so user data never reaches Google.

This article covers the full iOS 26 series, new Siri's capabilities, and Apple's AI strategy in detail.

iOS 26: 2026 Update at a Glance

Release Key Changes
iOS 26 Liquid Glass design, Apple Intelligence foundation
iOS 26.1 Transparency adjustment, alarm improvements, security hardening
iOS 26.2 Reminder alarms, lock screen clock customization
iOS 26.3 Android migration tool, RCS encryption
iOS 26.4 New Siri, personal context, screen awareness
Gemini partnership Google Gemini 3 adopted at ~$1B/year
Privacy All AI processing through Private Cloud Compute
HomePad New smart home device supporting new Siri

iOS 26 — Liquid Glass Design

A New Design Language

iOS 26 introduces "Liquid Glass" — a new visual language for the entire operating system.

Liquid Glass characteristics:

  • High-transparency UI elements
  • Backgrounds visible through interface layers
  • Soft, organic animations
  • Improved visual consistency across apps

iOS 26.1 Refinements

iOS 26.1 responded directly to user feedback on the initial Liquid Glass implementation.

Key improvements:

Transparency control:

  • Slider in Display & Brightness to adjust Liquid Glass transparency
  • "Reduce Transparency" option under Accessibility > Display & Text Size
  • Designed to address legibility concerns across varying wallpapers

Alarm behavior:

  • Dismissing an alarm now requires a swipe gesture rather than a tap
  • Substantially reduces the risk of accidentally dismissing instead of snoozing
  • A small change with meaningful real-world impact for early risers

Security:

  • Background automatic application of security patches
  • Rapid response to vulnerabilities as they are disclosed
  • Enable in Settings > Privacy & Security

Lock screen:

  • Option to disable the camera shortcut on the lock screen
  • Prevents accidental camera launches from the pocket or bag

iOS 26.2 Features

Reminder alarms:

  • Alarm functionality integrated directly into Reminders
  • More flexible notification options for time-sensitive tasks

Lock screen clock:

  • Font, color, and position customization for the lock screen clock
  • Expanded personalization without third-party apps

iOS 26.3 Features

Transfer to Android tool:

  • Simplified data migration from iPhone to Android (and reverse)
  • Automated transfer of contacts, photos, and app data

RCS encryption:

  • End-to-end encryption for RCS messages with Android users
  • Meaningful privacy improvement for cross-platform messaging

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New Siri — The Centerpiece of iOS 26.4

Google Gemini Integration

The new Siri arriving in iOS 26.4 is built on Google's Gemini 3 model.

Partnership details:

  • Multi-year contract valued at approximately $1 billion per year
  • Gemini 3 customized specifically for Apple's use case
  • Siri's conversational ability elevated to Gemini-class performance
  • Scheduled release: iOS 26.4, March 2026

Private Cloud Compute

Apple's privacy-first architecture keeps the Gemini model entirely within Apple infrastructure.

How privacy is protected:

  • Gemini model runs on Apple's Private Cloud Compute servers
  • No user data sent to Google
  • Processing stays inside Apple's infrastructure
  • End-to-end encryption throughout

New Siri Capabilities

Personal context:

  • Understands user preferences, habits, and history
  • Personalized responses that reflect individual usage patterns
  • More natural, contextually aware conversation

Onscreen awareness:

  • Understands what is currently displayed on the screen
  • Responds based on on-screen content
  • Uses app context to provide relevant, accurate answers

App integration:

  • Actions spanning multiple apps in a single request
  • Deep integration with third-party apps
  • Natural language control of app functions

HomePad

New Siri will extend beyond iPhone and iPad to new smart home hardware.

HomePad (planned):

  • Smart home hub with a built-in display
  • Central device for the new Siri experience
  • Whole-home control from a single interface

Apple TV and Services Rebrand

Brand Refresh

Apple is refreshing its services branding ahead of its 50th anniversary.

Changes:

  • "Apple TV Plus" simplified to "Apple TV" (the "Plus" is dropped)
  • More colorful icon design
  • New intro animation for the Apple TV app
  • UI that evokes the classic rainbow Apple logo

Apple One

Redesigned Apple One interface:

  • Each bundled service represented as a slice of an Apple logo
  • Visual unity across the full service bundle
  • Reinforces the sense of an interconnected ecosystem

Apple Music

Usability improvement:

  • Swipe left or right on the song title to skip forward or back
  • Matches the gesture vocabulary already second nature for most users
  • The classic double-arrow buttons remain available as an alternative

Apple Intelligence — The Full AI Picture

Apple Intelligence: Delays and Rebuilding

Apple Intelligence was announced at WWDC 2024 but has taken time to reach full implementation.

Timeline:

  • WWDC 2024: Apple Intelligence announced
  • 2025: AI leadership change (John Giannandrea → Amar Subramanya)
  • iOS 26.4: Full rollout begins

Looking Ahead

Health+ service (planned):

  • Apple Intelligence-powered health management
  • Personalized nutrition recommendations
  • Health-related suggestions and insights
  • Planned as a paid subscription

Then vs. Now: iOS Evolution

Item Then (iOS 18, 2024) Now (iOS 26, January 2026)
Design Traditional flat design Liquid Glass
Siri Basic voice assistant Gemini 3 integration, screen awareness
AI foundation Apple Intelligence announced Full rollout (iOS 26.4)
AI partner In-house + OpenAI Google Gemini (~$1B/year)
Privacy On-device processing focus Private Cloud Compute
Smart home HomePod only HomePad (planned)
Messaging iMessage-centric RCS encryption supported
Customization Limited Transparency, clock, many new options

Competitive Comparison

Apple vs Google (Android)

Item iOS 26 Android 17
AI assistant New Siri (Gemini-powered) Gemini (native)
Privacy Private Cloud Compute Google Cloud
Design Liquid Glass Material You 3
Ecosystem Apple device integration Open

Apple vs Samsung

Item iOS 26 One UI 8
AI features Apple Intelligence Galaxy AI
Customization Increasing High flexibility
Update period 5+ years 7 years

Adoption Considerations

Benefits

1. Privacy-first architecture

  • Private Cloud Compute keeps data within Apple's infrastructure
  • Users get Gemini-class AI without their data touching Google's servers

2. Seamless cross-device experience

  • Tight integration across iPhone, iPad, Mac, Apple Watch
  • Unified design language

3. New Siri's potential

  • Conversational ability elevated by Gemini integration
  • Screen awareness and personal context transform what Siri can do

Considerations

1. Wait for iOS 26.4

  • New Siri is on a March 2026 schedule
  • Full feature set rolling out gradually

2. Cost of the Gemini partnership

  • $1B/year commitment may eventually influence service pricing

3. Regional availability

  • Some features launching in specific regions first
  • Full availability in Japan is not yet confirmed

Summary

Apple iOS 26 fundamentally changes the iPhone experience through Liquid Glass design and a rebuilt Siri.

Key takeaways:

  • iOS 26 introduces Liquid Glass; transparency is now user-adjustable
  • iOS 26.1 improves alarm dismissal and adds automatic security patching
  • iOS 26.4 (March 2026) brings the new Siri
  • Google Gemini 3 integration dramatically elevates conversational capability
  • Private Cloud Compute keeps AI processing private — no data sent to Google
  • Screen awareness, personal context, and deep app integration arrive together
  • New Siri extending to HomePad and other smart home devices
  • Apple TV and Apple One rebranded ahead of Apple's 50th anniversary

Nearly two years after Apple Intelligence was announced at WWDC 2024, Apple's answer to the question of how to deliver compelling AI without sacrificing privacy has arrived: a strategic partnership with Google, executed on Apple's own infrastructure. Private Cloud Compute is the mechanism; the result is Gemini-class capability delivered with Apple-grade privacy.

With iOS 26.4, Siri evolves from a voice assistant into a genuine AI assistant — one that understands the screen, understands the user's context, and can act across apps. That evolution has the potential to change how iPhone is used every day.

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