The £849 titanium-cased Ultra is aimed at those who are serious about their sport — outdoors and on the water. It’s also a deliberate intrusion by the tech company into Garmin’s dominance of the high-end wearables market. Apple claims the Ultra has the most accurate GPS on the market and features orienteering tools, a dive computer and an emergency siren. It is larger than other watch models at 49 mm (1.93 inches) and can withstand extreme temperatures. However, with a battery life of 36 hours on a single charge — which could be extended to 60 hours later this
