Apple Watch Ultra 3 Review: 88/100 After 100+ Hours of Sports Testing

The Apple Watch Ultra 3 scores 88/100 after more than 100 hours of sports testing. Strong smartwatch credentials, solid sports tracking, but the battery remains the limiting factor for anyone chasing true ultra-endurance performance.

For context, the Ultra 3 sits in a crowded field against the Garmin Fenix 8, Coros Vertix 2S, and Polar Grit X2 Pro. Those devices regularly push 40 to 90 hours of GPS battery life. The Ultra 3 still can't match that ceiling, which matters the moment you sign up for anything longer than a Half Ironman or a 100-mile trail race.

Where it does deliver: the dual-frequency GPS is accurate and locks fast, the health sensors are best-in-class for a consumer device, and the display is the sharpest on any sport watch right now. Workload tracking and recovery metrics have improved, though they still lag behind dedicated platforms like Whoop or Garmin's Body Battery system for serious training load management.

The sweet spot for the Ultra 3 is the weekend warrior and the triathlete racing up to 70.3 distance. If your longest event fits inside a single charge window and you want seamless iPhone integration alongside your training data, this watch makes sense. Runners doing marathons, cyclists doing gran fondos, Hyrox athletes logging gym sessions: all well served here.

Verdict: great smartwatch, competent sports watch. Not the tool for a full Ironman or a 100-miler. Know your race distance before you buy.