iOS Ref
watchOS version by device
Apple Watch
Released
First watchOS
Max watchOS
Series 6
2020
7
7
SE
Series 5
2019
6
Series 4
2018
5
Series 3
2017
4
Series 2
2016
3
6
Series 1
Series 0
1
2014
1
4
1
“Series 0” is a commonly used nickname for the first generation Apple Watch.
