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Release record

iOS 11.3

Full article
Public release
Recorded milestones
7
Beta cycle
64d
Average interval
11d
Public release
Mar 29, 2018

Release notes

Overview

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

Release overview

iOS 11.3 was publicly released on March 29, 2018. The update paired new battery-health controls with ARKit 1.5, privacy disclosures, Health Records, Business Chat, new Animoji, and a large security set.[1][2][3][4]

Battery Health exposed capacity and performance-management information on supported iPhones. ARKit gained vertical-plane and image detection, while regional and device limits applied to Health Records, Business Chat, Animoji, and several other additions.[1][5][3][4]

Source ledger

References

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

  1. ARKit 1.5 Now Available

    Apple Developer · Apple · 2018-01-24T00:00:00.000Z · ARKit 1.5 feature description

    Back to text ↑
  2. About the security content of iOS 11.3

    Apple Support · Apple · 2023-11-06T00:00:00.000Z · iOS 11.3 — Released March 29, 2018

    Back to text ↑
  3. iOS 11.3 is available today

    Apple Newsroom · Apple · 2018-03-29T00:00:00.000Z · iOS 11.3 public availability and feature overview

    Back to text ↑
  4. About iOS 11 Updates

    Apple Support · Apple · 2023-11-15T00:00:00.000Z · iOS 11.3

    Back to text ↑
  5. About the security content of iOS 11.3

    Apple Support · Apple · 2023-11-06T00:00:00.000Z · iOS 11.3 — 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

iPhone Battery Health beta

documentedconfirmed

Battery Health also allowed eligible users to disable the dynamic performance-management feature after it was applied.

Recorded at Public

  1. [1] iOS 11.3 is available today · Batteries and Performance
  2. [2] About iOS 11 Updates · iOS 11.3 — iPhone Battery Health (Beta)

feature · introduced

Health Records beta

documentedconfirmed

Health Records launched in beta with institution-dependent access to items such as lab results, medications, and immunizations.

Recorded at Public

  1. [1] iOS 11.3 is available today · Health Records
  2. [2] About iOS 11 Updates · iOS 11.3 — Health Records (Beta)

security · fixed

iOS 11.3 security fixes

documentedconfirmed

Apple’s advisory documents a broad security set included with the March 29 public release.

Recorded at Public

  1. [1] About the security content of iOS 11.3 · iOS 11.3 — security content

feature · introduced

Animoji and Business Chat

documentedconfirmed

The release added lion, bear, dragon, and skull Animoji and introduced the Messages-based Business Chat service under its documented availability limits.

Recorded at Public

  1. [1] iOS 11.3 is available today · Animoji; Business Chat
  2. [2] About iOS 11 Updates · iOS 11.3 — Animoji; Business Chat

Milestones

Release history

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

  2. +13 days
  3. +14 days
  4. +13 days
  5. +7 days
  6. +4 days
  7. +13 days

    Public release

    Public

    Full articleEditorially verified

    iOS 11.3 reached the public release channel on March 29, 2018. iOS 11.3 was publicly released on March 29, 2018. The update paired new battery-health controls with ARKit 1.5, privacy disclosures, Health Records, Business Chat, new Animoji, and a large security set. This article records the public appearance only and does not assign cumulative notes to an earlier beta.

    Availability
    available
    Sources
    16 linked
    Open this appearance

Historical context

Cycle comparison

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

Historical avg for .3 releases

46 days, 4.9 milestones

Based on 15 previous iOS .3 releases

Cycle vs. platform average

64d (avg: 58d)

6 days longer than the iOS average

Longest gap in this cycle

14 days

Between Beta 2 and Beta 3

Previous .3 releases (iOS)

Previous comparable iOS releases
VersionYearCycleMilestonesAvg. Interval
iOS 26.3202658d515d
iOS 18.3202542d511d
iOS 17.3202441d510d
iOS 16.3202340d510d
iOS 15.3202240d413d
iOS 14.3202032d66d

Scroll horizontally to compare every historical field.

Official release notes