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:


  • 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:


  • 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


  • 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


  • 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.


  • 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.