Apple Watch Series 3

The Apple Watch Series 3 is a 4th generation smartwatch of the Apple Watch lineup that was designed and produced by Apple. It was launched on Septemer 12, 2017 alongside the iPhone 8/8 Plus and iPhone X at Apple's annual September event in the Steve Jobs Theater.

Features
The Series 3 came in two sizes like all the other models: a 38mm and a 42mm case size with matching band sizes for both. Cases were also available in stainless steel.

The Series 3 was the first Apple Watch to have cellular, which many customers wanted. This way, you could use your watch without your iPhone. The update also included the S3 chip, 768MB of RAM, and an altimeter.