This release introduces support for Apple Watch, and also includes improvements to the Health app, increased stability and bug fixes.

Apple Watch support

• New Apple Watch app to pair and sync with iPhone, and to customize watch settings
• New Activity app for viewing fitness data and achievements from Apple Watch; appears when Apple Watch is paired
• Available on iPhone 5 and later

Health app improvements

• Adds the ability to select the unit of measurement for distance, body temperature, height, weight and blood glucose
• Improves stability when dealing with large amounts of data
• Includes the ability to add and visualize workout sessions from 3rd-party apps
• Addresses an issue that may have prevented users from adding a photo in Medical ID
• Fixes units for vitamins and minerals
• Fixes an issue where Health data wouldn’t refresh after changing data source order
• Fixes an issue where some graphs showed no data values
• Adds a privacy setting that enables turning off tracking of steps, distance and flights climbed

Stability enhancements

• Increases stability of Mail
• Improves stability of Flyover in Maps
• Improves stability of Music
• Improves VoiceOver reliability
• Improves connectivity with Made for iPhone Hearing Aids

Bug fixes

• Fixes an issue in Maps that prevented navigating to some favorite locations
• Addresses an issue where the last word in a quick reply message wasn't autocorrected
• Fixes an issue where duplicate iTunes purchased content could prevent iCloud restore from completing
• Resolves an issue where some music or playlists didn’t sync from iTunes to the Music app
• Fixes an issue where deleted audiobooks sometimes remained on device
• Resolves an issue that could prevent call audio from routing to car speakers while using Siri Eyes Free
• Fixes a Bluetooth calling issue where no audio is heard until the call is answered
• Fixes a timezone issue where Calendar events appear in GMT
• Addresses an issue that caused certain events in a custom recurring meeting to drop from an Exchange calendar
• Fixes a certificate error that prevented configuring an Exchange account behind a third-party gateway
• Fixes an issue that could cause an organizer’s Exchange meeting notes to be overwritten
• Resolves an issue that prevented some Calendar events from automatically showing as 'Busy' after accepting an invite

For information on the security content of this update, please visit this website:

http://support.apple.com/kb/HT1222