"<p><a class=""body-btn-link"" href=""https://go.redirectingat.com?id=127X1599956&url=https%3A%2F%2Fwww.apple.com%2Fuk%2Fshop%2Fbuy-watch%2Fapple-watch%2F40mm-gps-space-grey-aluminium-black-sport-band&sref=http%3A%2F%2Fwww.esquire.com%2Fuk%2Fstyle%2Fwatches%2Fg9762%2Fbest-smartwatches%2F"" target=""_blank"">SHOP</a></p><p><strong>Best For: </strong>iPhone Purists<strong></strong><br></p><p>The Apple Watch. Also known as patient zero. As the Church of Jobs swooned, Switzerland shuddered - and with good reason. This game-changing smartwatch sold a staggering 15 million units upon its release.</p><p>So why the popularity? Well, it's Apple for a start. But there's merit behind the marketing, with the Series 4 boasting multiple vital sensors, a robust operating system and customisation options with the likes of Hermès - all of which is a huge improvement since the first generation of 2015.</p><p><em>Apple Watch Series 40mm, £399, <a href=""https://www.apple.com/uk/shop/buy-watch/apple-watch/40mm-gps-space-grey-aluminium-black-sport-band"" target=""_blank"">apple.com</a></em></p>"
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