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Release record

watchOS 5.1.3

Full article
Public release
Recorded milestones
4
Beta cycle
43d
Average interval
14d
Public release
Jan 22, 2019

Release notes

Overview

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

Release overview

watchOS 5.1.3 was released on January 22, 2019. Apple's consumer history characterizes it as improvements and bug fixes, while the accompanying advisory documents concrete security repairs.[1][2]

Evidence boundary

Apple did not enumerate an individual consumer feature for this point release. The article therefore preserves that limited description and records only the security areas explicitly listed in Apple's advisory.[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 watchOS 5.1.3

    Apple Support · Apple · 2019-01-22T00:00:00.000Z · Released January 22, 2019

    Back to text ↑
  2. About watchOS 5 Updates

    Apple Support · Apple · 2026-07-30 · watchOS 5.1.3

    Back to text ↑
  3. About the security content of watchOS 5.1.3

    Apple Support · Apple · 2019-01-22T00:00:00.000Z · watchOS 5.1.3 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.

security · fixed

watchOS 5.1.3 security repairs

documentedconfirmed

The release repaired vulnerabilities involving key storage, media and language processing, sandbox and kernel boundaries, SQLite, and WebKit.

Recorded at Public

  1. [1] About the security content of watchOS 5.1.3 · AppleKeyStore; Core Media; IOKit; Kernel; Natural Language Processing; SQLite; WebKit

bugFix · fixed

watchOS 5.1.3 maintenance update

documentedconfirmed

Apple described watchOS 5.1.3 as a maintenance release and did not publish a more granular consumer-facing fix list.

Recorded at Public

  1. [1] About watchOS 5 Updates · watchOS 5.1.3

Milestones

Release history

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

  2. +9 days
  3. +22 days
  4. +12 days

    Public release

    Public

    Full articleEditorially verified

    watchOS 5.1.3 reached the public channel on 2019-01-22. This article records Apple's version-labeled feature or maintenance notes and the accompanying first-party security record.

    Availability
    available
    Sources
    4 linked
    Open this appearance

Historical context

Cycle comparison

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

Historical avg for .1.3 releases

33 days, 3.0 milestones

Based on 1 previous watchOS .1.3 releases

Cycle vs. platform average

43d (avg: 58d)

15 days shorter than the watchOS average

Longest gap in this cycle

22 days

Between Beta 2 and Beta 3

Previous .1.3 releases (watchOS)

Previous comparable watchOS releases
VersionYearCycleMilestonesAvg. Interval
watchOS 3.1.3201733d317d

Scroll horizontally to compare every historical field.

Official release notes