More details:
Additional watchOS 2 features include:
-- Nightstand Mode that transforms Apple Watch into a bedside alarm clock, with the Digital Crown and side button serving as snooze and off buttons for the alarm;
-- the ability to use merchant rewards and store-issued credit and debit cards with Apple Pay(TM), which can be added to Wallet;
-- support for Transit in Maps*, so you can view detailed transportation maps and schedules, including walking directions to the nearest stations with entrances and exits precisely mapped;
-- workouts from third-party fitness apps contributing to your all-day Move and Exercise goals;
-- using Siri(R) to start specific workouts, launch Glances and reply to email; and
-- Activation Lock, which lets users secure their Apple Watch with their Apple ID, preventing another user from wiping or activating the device if it is lost or stolen.
Availability
watchOS 2 will be available this fall as a free update to Apple Watch. Apple Watch requires iPhone(R) 5, iPhone 5c, iPhone 5s, iPhone 6 or iPhone 6 Plus running iOS 8.2 or later. The iOS 9 SDK beta including WatchKit for watchOS 2 is available immediately for iOS Developer Program members at developer.apple.com/watchkit. Features are subject to change. Some features may not be available in all regions or all languages.
*Transit information in Maps will be available in select major cities this fall, including Baltimore, Berlin, Chicago, London, Mexico City, New York City, Philadelphia, the San Francisco Bay Area, Toronto and Washington D.C., as well as over 300 cities in China, including Beijing, Chengdu and Shanghai.