This sleek, cellular-enabled device is a step into the future, giving wearers a true hands-free experience. It is highly customisable and functions as a phone, able to make calls, with Siri transcribing messages. The Apple Watch Series 3 comes with GPS, which tracks routes, distance, speed and pace, while an altimeter tracks elevation. It monitors heart rate and performance for running, cycling, interval training and swimming. Access to third-party apps expands functionality even further, with custom apps designed to make use of the smartwatch’s hardware for everything from weightlifting to yoga. It can even be paired with compatible gym equipment.