Apple announced a new smartwatch at the beginning of September in the form of the Apple Watch Series 3, available in GPS only or GPS and Cellular models. The new smartwatch sits alongside the Apple Watch Series 1, which is essentially the same as the original device that hit shelves in April 2015, but with a newer dual-core processor than the first Watch.

The Series 2, which launched in September 2016, has been discontinued through Apple, though as you might still be able to get your hands on it elsewhere or want to know how the Series 3 differs to the Series 2 if you already have it, we’ve included it in this feature anyway.

With four generations having appeared since the Apple first set its sights on the smartwatch market, it’s all a bit confusing to say the least. To make matters a little more simple, we’ve compared the Apple Watch Series 3 to the Series 2, Series 1 and the original Apple Watch (2015) so you can see exactly what the differences and similarities are, whether you’re looking to upgrade or take the smartwatch plunge.
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https://www.pocket-lint.com/smartwatches/buyers-guides/apple/138782-apple-watch-series-4-vs-apple-watch-series-3-whats-the-difference