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Release appearance

watchOS 7.3 Public

Full article
Public release

Recorded context

About this appearance

watchOS 7.3 reached the public channel on January 26, 2021 with a commemorative watch face, a guided walking experience, expanded heart-health availability, a Zoom-related fix, and security repairs.

Date
Jan 26, 2021
Availability
available
Revision
No

Release notes

What changed

Original editorial synthesis. Linked references appear with the claims they support and in the source ledger.

Public release

Apple released watchOS 7.3 on January 26, 2021. Its consumer notes identify additions across watch-face design, Fitness+ audio, ECG and irregular-rhythm availability, plus a correction for Control Center and Notification Center when Zoom was enabled.[1][2]

Security record

The companion advisory documents additional repairs in APFS, audio and image processing, the kernel, WebKit, and WebRTC. This entry does not infer beta-only behavior or a separate undocumented-change list.[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 7.3

    Apple Support · Apple · 2021-01-26T00:00:00.000Z · Released January 26, 2021

    Back to text ↑
  2. About watchOS 7 Updates

    Apple Support · Apple · 2026-07-30 · watchOS 7.3

    Back to text ↑
  3. About the security content of watchOS 7.3

    Apple Support · Apple · 2021-01-26T00:00:00.000Z · APFS; CoreAudio; ImageIO; Kernel; WebKit; WebRTC

    Back to text ↑
  4. About watchOS 7 Updates

    Apple Support · Apple · 2026-07-30 · watchOS 7.3 — ECG app availability

  5. About watchOS 7 Updates

    Apple Support · Apple · 2026-07-30 · watchOS 7.3 — Irregular heart rhythm notifications

  6. About watchOS 7 Updates

    Apple Support · Apple · 2026-07-30 · watchOS 7.3 — Time to Walk

  7. About watchOS 7 Updates

    Apple Support · Apple · 2026-07-30 · watchOS 7.3 — Unity watch face

  8. About watchOS 7 Updates

    Apple Support · Apple · 2026-07-30 · watchOS 7.3 — Zoom fix

Release changes

Changed in this release

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

security · fixed

watchOS 7.3 security repairs

documentedconfirmed

Apple's advisory records fixes across APFS, CoreAudio, ImageIO, the kernel, WebKit, and WebRTC, including a kernel issue Apple said may have been actively exploited.

  1. [1] About the security content of watchOS 7.3 · APFS; CoreAudio; ImageIO; Kernel; WebKit; WebRTC

compatibility · introduced

ECG availability in four additional regions

documentedconfirmed

Apple expanded the regulated ECG app to four additional markets, subject to supported hardware and local availability.

  1. [1] About watchOS 7 Updates · watchOS 7.3 — ECG app availability

feature · introduced

Time to Walk

documentedconfirmed

The Workout app gained Time to Walk, pairing guest stories and audio with a guided walking session for Apple Fitness+ subscribers.

  1. [1] About watchOS 7 Updates · watchOS 7.3 — Time to Walk

feature · introduced

Unity watch face

documentedconfirmed

watchOS 7.3 added the Unity face, whose changing shapes and color treatment were designed to recognize Black history and culture.

  1. [1] About watchOS 7 Updates · watchOS 7.3 — Unity watch face

bugFix · fixed

Zoom navigation reliability

documentedconfirmed

Apple repaired an accessibility-related interaction failure affecting the two system overlays while display Zoom was enabled.

  1. [1] About watchOS 7 Updates · watchOS 7.3 — Zoom fix

compatibility · introduced

Irregular-rhythm notifications in five additional regions

documentedconfirmed

The update extended irregular-rhythm notification availability to five additional markets where the feature had received support.

  1. [1] About watchOS 7 Updates · watchOS 7.3 — Irregular heart rhythm notifications