Version RecordIndependent release archive
Menu

Release record

watchOS 5.1.2

Full article
Public release
Recorded milestones
3
Beta cycle
29d
Average interval
15d
Public release
Dec 6, 2018

Release notes

Overview

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

Release overview

watchOS 5.1.2 was released on December 6, 2018 with the ECG app and irregular-rhythm notifications in supported United States territories, Wallet, Activity, complication and Walkie-Talkie improvements, and security repairs.[1][2][3]

Evidence boundary

The ECG app required Apple Watch Series 4 and regulated regional availability; irregular-rhythm notifications also had regional limits. The page preserves those qualifications and does not present either feature as diagnosis or medical advice.[4][5]

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 5.1.2

    Apple Support · Apple · 2018-12-06T00:00:00.000Z · Released December 6, 2018

    Back to text ↑
  2. ECG app and irregular heart rhythm notification available today on Apple Watch

    Apple Newsroom · Apple · 2018-12-06T00:00:00.000Z · Update December 6, 2018

    Back to text ↑
  3. About watchOS 5 Updates

    Apple Support · Apple · 2026-07-30 · watchOS 5.1.2

    Back to text ↑
  4. ECG app and irregular heart rhythm notification available today on Apple Watch

    Apple Newsroom · Apple · 2018-12-06T00:00:00.000Z · Availability and medical-feature qualifications

    Back to text ↑
  5. About watchOS 5 Updates

    Apple Support · Apple · 2026-07-30 · watchOS 5.1.2 — regional qualifications

    Back to text ↑
  6. ECG app and irregular heart rhythm notification available today on Apple Watch

    Apple Newsroom · Apple · 2018-12-06T00:00:00.000Z · December 6, 2018

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.

enhancement · changed

Contactless Wallet pass access

documentedconfirmed

The update shortened access to eligible Wallet passes during a contactless interaction.

Recorded at Public

  1. [1] About watchOS 5 Updates · watchOS 5.1.2 — Wallet

enhancement · changed

Additional Infograph complications

documentedconfirmed

Apple expanded the data and shortcuts that Series 4 Infograph layouts could place on the face.

Recorded at Public

  1. [1] About watchOS 5 Updates · watchOS 5.1.2 — Infograph complications

enhancement · changed

Activity competition maximum-point feedback

documentedconfirmed

The update made a top-scoring competition day more visible with immediate feedback and celebration.

Recorded at Public

  1. [1] About watchOS 5 Updates · watchOS 5.1.2 — Activity competition

security · fixed

watchOS 5.1.2 security repairs

documentedconfirmed

Apple's advisory documents privilege, code-execution, information-disclosure, denial-of-service, spoofing, certificate-validation, and web-processing fixes.

Recorded at Public

  1. [1] About the security content of watchOS 5.1.2 · Airport; Disk Images; Kernel; LinkPresentation; Profiles; WebKit

enhancement · changed

Walkie-Talkie availability in Control Center

documentedconfirmed

The release exposed the service's availability state in a faster system-level control.

Recorded at Public

  1. [1] About watchOS 5 Updates · watchOS 5.1.2 — Walkie-Talkie

Milestones

Release history

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

  2. +8 days
  3. +21 days

    Public release

    Public

    Full articleEditorially verified

    watchOS 5.1.2 reached the public channel on December 6, 2018 with regulated heart features, pass access, competition feedback, new complications, Walkie-Talkie controls, and security repairs.

    Availability
    available
    Sources
    15 linked
    Open this appearance

Historical context

Cycle comparison

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

Historical avg for .1.2 releases

42 days, 4.0 milestones

Based on 1 previous watchOS .1.2 releases

Cycle vs. platform average

29d (avg: 59d)

30 days shorter than the watchOS average

Longest gap in this cycle

21 days

Between Beta 2 and Public

Previous .1.2 releases (watchOS)

Previous comparable watchOS releases
VersionYearCycleMilestonesAvg. Interval
watchOS 6.1.2202042d414d

Scroll horizontally to compare every historical field.

Official release notes