There's an Apple Watch for everyone.

Apple Watch Series 3
Apple Watch Series 1

1. Apple Watch Series 3 (GPS + Cellular) requires an iPhone 6 or later with iOS 11 or later. Apple Watch and iPhone service provider must be the same. Not available with all service providers. Roaming is not available outside your carrier network coverage area. Wireless service plan required for cellular service. Contact your service provider for more details. Check apple.com/uk/watch/cellular for participating wireless carriers and eligibility.
2. Apple Music requires a subscription.
3. Apple Watch Series 3 has a water resistance rating of 50 metres under ISO standard 22810:2010. This means that it may be used for shallow-water activities like swimming in a pool or ocean. However, Apple Watch Series 3 should not be used for scuba diving, waterskiing, or other activities involving high-velocity water or submersion below shallow depth.
Selection may vary. Some straps are sold separately.
Some features may not be available in all countries or regions.
AirPods are sold separately.