Release appearance
iOS 16.4 Public
Recorded context
About this appearance
iOS 16.4 expanded emoji, web-app notifications, calling, Photos, accessibility, Matter, and developer-beta enrollment.
- Date
- Mar 27, 2023
- Availability
- available
- Revision
- No
Chronology evidence
Appearance sources
These sources support the recorded date, channel, or availability. A researched release-notes article has not been added.
- iOS & iPadOS 16.4 Release Notes
Apple Developer · 2026-07-29 · Beta enrollment for iPhone and iPad — New Features
- About iOS 16 Updates
Apple Support · 2026-07-29 · iOS 16.4 — enhancements
- About iOS 16 Updates
Apple Support · 2026-07-29 · iOS 16.4
Release changes
Changed in this release
Features, fixes, removals, and regressions first observed in this release record.
enhancement · introduced
Shared Library duplicate detection
The Duplicates album expanded to iCloud Shared Photo Library content.
- [1] About iOS 16 Updates · iOS 16.4 — enhancements
developerApi · introduced
Settings-based developer beta enrollment
Developer beta enrollment moved into Settings > General > Software Update for eligible program members.
- [1] iOS & iPadOS 16.4 Release Notes · Beta enrollment for iPhone and iPad — New Features
feature · introduced
Automatic flashing-light dimming
Users could enable automatic dimming for detected flashes or strobe effects in video.
- [1] About iOS 16 Updates · iOS 16.4 — enhancements
feature · introduced
Twenty-one additional emoji
The emoji keyboard gained 21 additional characters.
- [1] About iOS 16 Updates · iOS 16.4 — enhancements
feature · introduced
Home Screen web-app notifications
Home Screen web apps gained notification support.
- [1] About iOS 16 Updates · iOS 16.4 — enhancements
enhancement · introduced
Voice Isolation for cellular calls
Cellular calls gained Voice Isolation to emphasize the user’s voice over surrounding noise.
- [1] About iOS 16 Updates · iOS 16.4 — enhancements