Apple released watchOS 4.1 publicly on October 31, 2017.

The software update ic compatible with all Apple Watch models and enables such features as a brand new Radio app, the ability to stream music via Wi-Fi or cellular from Beats 1, Apple Music or your iCloud Music Library, support for syncing fitness data with GymKit-compatible equipment, a dedicated Wi-Fi Control Center toggle on Series 3 watch models and more.

watchOS 4.1 release notes

watchOS 4.1 includes the following new features, improvements and bug fixes:

Emoji

  • Over 70 new emoji characters including new food types, animals, mythical creatures, clothing options, more expressive smiley faces, gender-neutral characters and more
  • Stream music on Apple Watch Series 3 with Apple Music or iCloud Music Library
  • Listen to live radio on Beats 1, custom stations and expert-curated stations with the new Radio app on Apple Watch Series 3
  • Use Siri to find, discover and play songs, playlists or albums
  • Sync fitness data with GymKit-enabled treadmills, ellipticals, stair steppers and indoor bikes for more accurate distance, pace and energy burn metrics
  • Ability to disconnect from a Wi-Fi network in Control Center for Apple Watch Series 3 (GPS + Cellular)
  • Fixes an issue for Apple Watch Series 1 and later where Heart Rate notifications were delivered when the feature was not enabled
  • Fixes an issue where some users did not receive Stand Reminders
  • Resolves an issue where the current stand hour indicator did not appear for some users
  • Resolves an issue that caused haptics to not be delivered for silent alarms
  • Addresses an issue that prevented Apple Watch (1st generation) from charging for some users
  • Resolves an issue where the Sunrise and Sunset complication would sometimes not appear
  • Restores Mandarin as the default dictation language for China

watchOS 4.1 security fixes

watchOS 4.1 fixes the following vulnerabilities:

CoreText

  • Available for: All Apple Watch models
  • Impact: Processing a maliciously crafted text file may lead to an unexpected application termination
  • Description: A denial of service issue was addressed through improved memory handling.
  • CVE-ID: CVE-2017-13849: Ro of SavSec

Kernel

  • Available for: All Apple Watch models
  • Impact: An application may be able to execute arbitrary code with kernel privileges
  • Description: A memory corruption issue was addressed with improved memory handling.
  • CVE-ID: CVE-2017-13799: an anonymous researcher

StreamingZip

  • Available for: All Apple Watch models
  • Impact: A malicious zip file may be able modify restricted areas of the file system
  • Description: A path handling issue was addressed with improved validation.
  • CVE-ID: CVE-2017-13804: @qwertyoruiopz at KJC Research Intl. S.R.L.

Wi-Fi

  • Available for: Apple Watch Series 1 and Apple Watch Series 2
  • Impact: An attacker in Wi-Fi range may force nonce reuse in WPA clients (Key Reinstallation Attacks – KRACK)
  • Description: A logic issue existed in the handling of state transitions. This was addressed with improved state management.
  • CVE-ID: CVE-2017-13080: Mathy Vanhoef of the imec-DistriNet group at KU Leuven

For details on the security content of watchOS 4.1, visit Apple’s website. For information about the security content of Apple software updates, check out Apple’s support document.

watchOS 4.1 is supported across all Apple Watch models.