The stainless steel models are a good chunk more expensive, and they come in Graphite, Silver and Gold colour options with Solo Loop, Braided Solo Loop, Sport Loop, Leather or Stainless Steel straps, with prices varying depending on your strap choice. The aluminium models also come in GPS and GPS and Cellular connectivity options. There are several colours available in each, which you can read all about in the strap section below. The aluminium models come in Green, Blue, Starlight, Midnight and Product(RED) colour options with either a Solo Loop, Braided Solo Loop, Sport Band, Sport Loop or Leather Link strap as standard. There are 23 standard models available - ignoring the specialist ranges like Nike, Hermès and Watch Edition for now - we'll go into those further down. It also comes in different size options to the Series 3 at 41mm and 45mm, and it offers an Always-On Display, built-in compass, always-on altimeter and a blood oxygen sensor, as well as a U1 chip.

The Apple Watch Series 7 offers all the same features as Series 3 including waterproofing and built-in GPS but it has an upgraded S7 processor with W3 wireless chip, an electrical heart sensor on the Digital Crown and a bigger display within a similar footprint to the Series 3, resulting in a bolder design. Straps included: Solo Loop, Braided Solo Loop, Sport Band, Sport Loop, Leather Link, Milanese Loop, Leather Loop, Modern Buckle.Colours: Five aluminium, three stainless steel.

What are apple loops