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Release record

watchOS 5.2

Full article
Public release
Recorded milestones
7
Beta cycle
62d
Average interval
10d
Public release
Mar 27, 2019

Release notes

Overview

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

Release overview

watchOS 5.2 was released on March 27, 2019 with ECG and irregular-rhythm notification expansion in Hong Kong and parts of Europe, second-generation AirPods support, real-time text calling, and security repairs.[1][2]

Evidence boundary

Health-feature availability remained region- and device-dependent. This record names the regions exactly at the level Apple documented and does not treat later market expansions as part of 5.2.[3][4]

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 5.2

    Apple Support · Apple · 2019-03-27T00:00:00.000Z · Released March 27, 2019

    Back to text ↑
  2. About watchOS 5 Updates

    Apple Support · Apple · 2026-07-30 · watchOS 5.2

    Back to text ↑
  3. About the security content of watchOS 5.2

    Apple Support · Apple · 2019-03-27T00:00:00.000Z · watchOS 5.2 security content

    Back to text ↑
  4. About watchOS 5 Updates

    Apple Support · Apple · 2026-07-30 · watchOS 5.2; regional availability note

    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 5.2 security repairs

documentedconfirmed

The release repaired vulnerabilities across contacts and messages, privacy and passcode handling, privilege boundaries, the kernel, fonts, Siri, and WebKit.

Recorded at Public

  1. [1] About the security content of watchOS 5.2 · Contacts; Kernel; Messages; Passcode; Privacy; Sandbox; Siri; TrueTypeScaler; WebKit

feature · introduced

Real-time text for phone calls

documentedconfirmed

The update enabled real-time text during compatible phone calls, adding a live typed communication option on Apple Watch.

Recorded at Public

  1. [1] About watchOS 5 Updates · watchOS 5.2 — real-time text (RTT)

compatibility · introduced

Irregular-rhythm notifications expand regionally

documentedconfirmed

The release extended irregular-rhythm notifications to Hong Kong and supported parts of Europe, subject to Apple's regional availability.

Recorded at Public

  1. [1] About watchOS 5 Updates · watchOS 5.2 — Irregular heart rhythm notifications

compatibility · introduced

Second-generation AirPods support

documentedconfirmed

watchOS 5.2 added system support for pairing and using Apple's second-generation AirPods with Apple Watch.

Recorded at Public

  1. [1] About watchOS 5 Updates · watchOS 5.2 — AirPods (2nd generation)

compatibility · introduced

ECG expands to Hong Kong and parts of Europe

documentedconfirmed

watchOS 5.2 expanded the regulated ECG feature beyond its earlier markets to Hong Kong and a set of supported European regions.

Recorded at Public

  1. [1] About watchOS 5 Updates · watchOS 5.2 — ECG app availability

Milestones

Release history

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

  2. +11 days
  3. +16 days
  4. +12 days
  5. +7 days
  6. +7 days
  7. +9 days

    Public release

    Public

    Full articleEditorially verified

    watchOS 5.2 reached the public channel on 2019-03-27. This article records Apple's version-labeled feature or maintenance notes and the accompanying first-party security record.

    Availability
    available
    Sources
    9 linked
    Open this appearance

Historical context

Cycle comparison

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

Historical avg for .2 releases

44 days, 5.2 milestones

Based on 10 previous watchOS .2 releases

Cycle vs. platform average

62d (avg: 58d)

4 days longer than the watchOS average

Duration ranking

#17 of 49

Middle of the pack watchOS beta cycles

Longest gap in this cycle

16 days

Between Beta 2 and Beta 3

Previous .2 releases (watchOS)

Previous comparable watchOS releases
VersionYearCycleMilestonesAvg. Interval
watchOS 7.2202032d58d
watchOS 6.2202048d78d
watchOS 6.1.2202042d414d
watchOS 5.1.2201829d315d
watchOS 4.2.2201841d68d
watchOS 4.2201736d59d

Scroll horizontally to compare every historical field.

Official release notes