Version RecordIndependent release archive
Menu

Release record

iOS 11.4

Full article
Public release
Recorded milestones
7
Beta cycle
57d
Average interval
10d
Public release
May 29, 2018

Release notes

Overview

Editorial synthesis with inline references and a source ledger when citations are available.

Release overview

iOS 11.4 was publicly released on May 29, 2018. Its headline additions were AirPlay 2 multi-room audio, HomePod stereo-pair setup, Messages in iCloud, and a broad set of security fixes.[1][2]

AirPlay 2 coordinated playback and controls across compatible speakers, HomePod gained stereo-pair support, and Messages in iCloud synchronized stored conversations and deletions across signed-in devices with end-to-end encryption.[3][2]

Source ledger

References

Sources are linked to the claims they support. Publication and access dates are shown when available.

  1. About the security content of iOS 11.4

    Apple Support · Apple · 2023-11-02T00:00:00.000Z · iOS 11.4 — Released May 29, 2018

    Back to text ↑
  2. About iOS 11 Updates

    Apple Support · Apple · 2023-11-15T00:00:00.000Z · iOS 11.4

    Back to text ↑
  3. About the security content of iOS 11.4

    Apple Support · Apple · 2023-11-02T00:00:00.000Z · iOS 11.4 — security content

    Back to text ↑

Documented & observed

Changes in this version

Source-linked features, fixes, known issues, removals, and community-observed behavior recorded across this version’s appearances and verified builds.

Release changes

Changed in this release

Features, fixes, removals, and regressions first observed in this release record.

feature · introduced

HomePod stereo-pair setup

documentedconfirmed

The release added iOS-side setup support for HomePod stereo pairs and their automatic spatial balancing.

Recorded at Public

  1. [1] About iOS 11 Updates · iOS 11.4 — HomePod stereo pair

feature · introduced

AirPlay 2 multi-room audio

documentedconfirmed

The update added multi-room audio controls through Control Center, the Lock Screen, apps, and Siri on supported configurations.

Recorded at Public

  1. [1] About iOS 11 Updates · iOS 11.4 — AirPlay 2

feature · introduced

Messages in iCloud

documentedconfirmed

The feature reduced local storage use, restored conversations on newly signed-in devices, and retained end-to-end encryption.

Recorded at Public

  1. [1] About iOS 11 Updates · iOS 11.4 — Messages in iCloud

security · fixed

iOS 11.4 security fixes

documentedconfirmed

Apple’s advisory documents a broad security set shipped with the May 29 public release.

Recorded at Public

  1. [1] About the security content of iOS 11.4 · iOS 11.4 — security content

Milestones

Release history

Every recorded channel appearance in chronological order. Open an appearance for any available build, scope, notes, and sources.

  2. +14 days
  3. +15 days
  4. +6 days
  5. +7 days
  6. +3 days
  7. +12 days

    Public release

    Public

    Full articleEditorially verified

    iOS 11.4 reached the public release channel on May 29, 2018. iOS 11.4 was publicly released on May 29, 2018. Its headline additions were AirPlay 2 multi-room audio, HomePod stereo-pair setup, Messages in iCloud, and a broad set of security fixes. This article records the public appearance only and does not assign cumulative notes to an earlier beta.

    Availability
    available
    Sources
    6 linked
    Open this appearance

Historical context

Cycle comparison

Pace, intervals, and duration compared with earlier releases on the same platform.

Historical avg for .4 releases

48 days, 6.4 milestones

Based on 9 previous iOS .4 releases

Cycle vs. platform average

57d (avg: 58d)

1 days shorter than the iOS average

Longest gap in this cycle

15 days

Between Beta 2 and Beta 3

Previous .4 releases (iOS)

Previous comparable iOS releases
VersionYearCycleMilestonesAvg. Interval
iOS 26.4202636d76d
iOS 18.4202538d76d
iOS 17.4202440d77d
iOS 16.4202339d68d
iOS 15.4202246d78d
iOS 14.4202141d414d

Scroll horizontally to compare every historical field.

Official release notes