iPhone? Apple Watch. Android? Galaxy Watch. Neither works well cross-platform.
Galaxy Watch Ultra: 3 days. Apple Watch: 18 hours. This is Samsung's biggest advantage — you charge every 3 days instead of every night.
Apple Watch 11 now has blood pressure monitoring — a first for smartwatches. Both have ECG, SpO2, sleep tracking, and workout detection. Apple's health data integration with iPhone is smoother.
Both excellent for fitness tracking. Samsung has slightly better body composition measurement. Apple has better workout app ecosystem. For serious athletes, both lose to Garmin.
Apple Watch: iconic round-rect. Galaxy Watch Ultra: rugged titanium. Both are premium. Personal preference.
Apple Watch 11 if you have an iPhone and want the best health features. Galaxy Watch 7 Ultra if you want 3-day battery and have Android.
Best for iPhone — health king
Best for Android — rugged with 3-day battery