Platform: Apple Watch Series 3+
Introduction and announcement; not a sales date.
Apple source ↗Apple previewed watchOS 7 on June 22, 2020, and released it on September 16 for Series 3 and later. The announcement required iPhone 6s or later with iOS 14. Face sharing meant configurations and complications, not an unrestricted store for any face design.

Apple · watchOS 7 preview · 2020-06-22 · Apple · Security release register 2020-2021
Sleep used accelerometer motion to estimate asleep and awake time, with schedules and charging reminders. Handwashing used motion and sound for a 20-second countdown but required Series 4 or later. Installing on Series 3 did not add it. Neither is presented as a medical diagnosis.
Apple · watchOS 7 preview · 2020-06-22 · Apple · watchOS 7 notes
Family Setup managed a relative's watch without their own iPhone from the organizer's iPhone. It required cellular Series 4 or later or SE, Family Sharing and accounts; cellular service depended on carrier and plan. It was neither complete independence from iPhone nor every normal pairing feature.
Apple · Family Setup · 2020-09-15 · Apple · watchOS 7 notes
The 7.2 notes added subscription Fitness+ in specified initial markets and Family Setup in Spain among other countries, not worldwide at 7.0 launch. The table retains 7.0.3 for Series 3 only and 7.3.1 for Series 5 and SE, the latter addressing charging after Power Reserve.
Apple · watchOS 7 notes · Apple · Security release register 2020-2021
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 Series 3+
Introduction and announcement; not a sales date.
Apple source ↗Platform: Apple Watch Series 3+
Release date recorded by Apple, not the document revision date.
Apple source ↗Platform: Apple Watch Series 3+
Release date recorded by Apple, not the document revision date.
Apple source ↗Platform: Apple Watch Series 3+
Release date recorded by Apple, not the document revision date.
Apple source ↗Platform: Apple Watch Series 3
Release date recorded by Apple, not the document revision date.
Apple source ↗Platform: Apple Watch Series 3+
Release date recorded by Apple, not the document revision date.
Apple source ↗Platform: Apple Watch Series 3+
Release date recorded by Apple, not the document revision date.
Apple source ↗Platform: Apple Watch Series 3+
Release date recorded by Apple, not the document revision date.
Apple source ↗Platform: Apple Watch Series 5 / Apple Watch SE
Release date recorded by Apple, not the document revision date.
Apple source ↗Platform: Apple Watch Series 3+
Release date recorded by Apple, not the document revision date.
Apple source ↗Platform: Apple Watch Series 3+
Release date recorded by Apple, not the document revision date.
Apple source ↗Platform: Apple Watch Series 3+
Release date recorded by Apple, not the document revision date.
Apple source ↗Platform: Apple Watch Series 3+
Release date recorded by Apple, not the document revision date.
Apple source ↗Platform: Apple Watch Series 3+
Release date recorded by Apple, not the document revision date.
Apple source ↗Platform: Apple Watch Series 3+
Release date recorded by Apple, not the document revision date.
Apple source ↗Platform: Apple Watch Series 3+
Release date recorded by Apple, not the document revision date.
Apple source ↗Platform: Apple Watch Series 3+
Release date recorded by Apple, not the document revision date.
Apple source ↗