Platform: Apple Watch / Apple Watch Sport / Apple Watch Edition
Release date recorded by Apple, not the document revision date.
Apple source ↗The first Apple Watch system was tied to iPhone. Apple introduced the watch interface on September 9, 2014, and opened WatchKit to developers on November 18. In March 2015 it set April 24 for initial availability in nine markets; this hardware plan is not turned into a worldwide watchOS 1.0 download date here.

Apple · Watch interface · 2014-09-09 · Apple · WatchKit tools · 2014-11-18 · Apple · Initial availability announcement · 2015-03-09
The Digital Crown scrolled and zoomed without covering the screen; Force Touch distinguished a tap from a press. Glances summarized information and Friends gathered contacts through the side button. Notifications, Siri and Digital Touch shaped a wrist interface rather than merely shrinking an iPhone screen.
Apple · Watch interface · 2014-09-09 · Apple · Initial availability announcement · 2015-03-09
Activity organized active calories, exercise and standing into three rings; Workout gathered session metrics. The launch announcement described iPhone GPS and Wi-Fi in this measurement, so built-in GPS must not be assigned to the original watch. The iOS 8.2 Apple Watch app provided app discovery and downloads.
Apple · Initial availability announcement · 2015-03-09
WatchKit offered actionable notifications and Glances before fully native apps planned for later. The 1.0.1 notes list Siri, activity measurement, accessibility and third-party app improvements plus languages. Apple dates this update to May 19, 2015, not March 2024, the visible revision date of its notes.
Apple · WatchKit tools · 2014-11-18 · Apple · Watch OS 1.0.1 notes · Apple · Security release register 2015
Selected releases, not a complete history. Dates follow Apple's release records, not the latest page edit. No builds are included.
ISO date: year-month-day.
Platform: Apple Watch / Apple Watch Sport / Apple Watch Edition
Release date recorded by Apple, not the document revision date.
Apple source ↗