For long outdoor sessions and built-in training tools, the Garmin Fenix 9 Pro is the stronger fit; for a broader app selection and Apple’s health interface, the Apple Watch Ultra 4 may suit you better. That’s Matthew Miller’s takeaway after several weeks using both watches across activities including trail running, hiking, cycling, rowing and golf—not a universal verdict for every routine. ZDNET’s comparison
Where each watch stands out
| What matters | Garmin Fenix 9 Pro | Apple Watch Ultra 4 |
| Outdoor activities and navigation | Miller reports configurable daily suggested workouts, built-in options for activities such as golf, alpine skiing and fishing, and navigation for cycling, hiking and trail running. ZDNET | Miller describes using third-party apps for activities, including GolfShot for golf, Slopes for skiing and Anglr for fly fishing. ZDNET |
| Flashlight | Miller reports a dedicated LED flashlight with white, red and green settings, plus a running cadence mode that alternates white and red. ZDNET | Miller says the Ultra 4 does not have a dedicated LED flashlight. ZDNET |
| Health and activity interface | Miller describes Garmin’s Essentials and At a Glance controls and says he preferred its metrics experience. ZDNET | Miller discusses Apple Health sections including Sleep, Readiness, Fitness status, Heart vitals and Longevity. ZDNET |
The difference is practical: Garmin offers more of the outdoor workflow directly on the watch, while Apple’s approach gives Miller more room to choose apps. If you want navigation and activity tools without adding third-party apps, Garmin’s setup may be more convenient. If you already use Apple’s health interface or want to pick activity apps, the Ultra 4 has the appeal Miller describes.
Apple Watch Ultra 4 battery life, mode by mode
Apple’s runtime estimates vary by use. The company lists up to 50 hours for everyday use and up to 84 hours in Low Power Mode. Workout estimates depend on tracking settings: Extended Workout is rated for up to 25 hours with full GPS and heart-rate readings, while Max Extended Workout is rated for up to 45 hours with GPS readings every second. Apple says actual battery life varies with use and other conditions. Apple’s Ultra 4 announcement
| Apple Watch Ultra 4 mode | Maximum estimated runtime | Specified conditions |
| Everyday use | Up to 50 hours | Everyday use |
| Low Power Mode | Up to 84 hours | Low Power Mode |
| Extended Workout | Up to 25 hours | Full GPS and heart-rate readings |
| Max Extended Workout | Up to 45 hours | GPS readings every second |
For the Fenix 9 Pro, ZDNET lists up to 31 days in smartwatch mode and 151 hours of maximum-battery GPS tracking for the 51 mm model. Those figures use Garmin’s named modes; Apple’s workout estimates above describe different tracking conditions. ZDNET For a trip where charging opportunities are scarce, the Fenix figures point toward longer endurance. For the Ultra 4, check which workout mode matches the tracking you plan to use rather than relying on its highest runtime number alone.
Built-in outdoor tools and a flashlight
Miller reports that the Fenix 9 Pro can suggest configurable daily workouts and offers activity tools for golf, alpine skiing and fishing, along with navigation for cycling, hiking and trail running. Its built-in flashlight adds white, red and green settings; a cadence mode alternates white and red as the wearer’s arm swings, according to Miller’s account. ZDNET
Those functions matter most when you want training and navigation tools ready on the watch, or when a dedicated light is useful on a run. Miller’s observations come from his reported use of both devices over several weeks; they describe his experience, not a standardized performance ranking.
A separate month-long account comes from Recovery for Athletes. Its creator says he wore a 47 mm AMOLED Garmin Fenix 9 Pro without inReach every day for a month and does not own the Ultra 4; his Apple discussion draws on specifications, owner reports and published reviews. Watch the English-language comparison
Apple apps and health features
Miller says he uses third-party Apple Watch apps such as GolfShot, Slopes and Anglr, and values the Ultra 4’s app ecosystem and health interface. Apple’s launch announcement describes a Readiness score from 0 to 10 based on recent activity, training load, vital signs and sleep score, with recommendations labeled Recover, Pace Yourself, Ready or Go For It. Apple’s Ultra 4 announcement The score is a watch feature, while Miller’s preference for Apple’s health interface is his personal assessment.
For U.S. buyers, Apple announced a starting price of $799 on September 9, 2026. Apple’s announcement
Set up Apple satellite features before a trip
Apple says supported Ultra watches can use satellite features for Emergency SOS, messages and location sharing. Set them up before leaving cellular or Wi-Fi coverage. Availability varies by country or region; messages and location sharing require an active carrier plan, and satellite messaging requires an active watch SIM. Apple says the satellite features are free for two years after Ultra activation. Apple Support’s setup instructions
That makes advance setup and regional eligibility part of the trip plan. Apple’s instructions also call for a paired iPhone for setup and iMessage activation.
