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Introduction to watchOS 4

  • Article

Access new features of watchOS 4 in your apps:

  • Read barometric altimeter data in the new Apple Watch Series 3.
  • Connect directly to network resources with cellular data available on some Apple Watch Series 3 models.
  • Core Bluetooth can connect directly to accessories.
  • New background modes for workout and audio apps.
  • New SiriKit intents for lists and notes.

Changes since watchOS 3:

  • App code and UI run in a single process.
  • Location permission can be granted on the watch (no need to ask the user to accept on their phone).