Smartwatches · owner-verdict comparison

Apple Watch Ultra 3 vs Fenix 8: what real owners say

Real owners lean toward the Fenix 8: 59% of 110 owners recommend it, vs 45% of 64 for the Apple Watch Ultra 3.

Verdicts aggregated from Reddit, enthusiast forums, and YouTube owner comments — affiliate reviews excluded. Sample sizes differ; judge accordingly. How we score

Apple Watch Ultra 3

45%of 64 owners recommend
45% recommend · 32% neutral · 23% don't
Owners praise
  • Heart rate tracking is consistently praised as accurate and steady, with owners reporting no drop-outs and comparing it favorably to Garmin's Epix and Fenix line
  • Deep Apple ecosystem integration (iPhone, Mac) is a major draw that owners say has no real comparison among rivals
  • Battery life is solid for daily wear and gets owners through 4+ hour runs and full training days
Owners complain about
  • A recurring subset of owners end up switching to or preferring Garmin (Fenix 8, Enduro 3, Tactix 7) for serious training and fitness tracking, citing better dedicated sports features
  • Some owners report the heart rate sensor drops out during runs or lacks detailed data compared to Garmin, pushing them to pair a chest strap
  • Battery life is seen as a weak point next to Garmin, with owners noting it needs daily charging and calling it 'trash' compared to multi-day Garmin batteries
Full owner report →

Fenix 8

59%of 110 owners recommend
59% recommend · 16% neutral · 25% don't
Owners praise
  • Rock-solid reliability for many owners, repeated reports of zero bugs, zero issues, and smooth performance out of the box
  • Strong battery life, especially on Solar/MIP models, with owners citing 13+ day stretches and no more daily charging anxiety
  • Sharp, bright AMOLED display and a readable-in-sunlight MIP option praised as the best screen in the Fenix lineup
Owners complain about
  • Price is the single biggest complaint, many call the cost (often $1,000+) unjustified given how minor the upgrade feels
  • Software bugs and glitches at launch, with some saying Garmin released it too early or felt like a beta product
  • Missing cellular/LTE connectivity is a recurring dealbreaker for owners who wanted it
Full owner report →

Which should you buy?

Get the Apple Watch Ultra 3 if
  • ✓Apple ecosystem users who want a smartwatch first, fitness tracker second
  • ✓Runners and swimmers satisfied with solid (not Garmin-grade) HR and GPS accuracy
  • ✓Daily/all-day wearers who value sleep tracking and battery good enough for a full day plus workouts
  • ✓Athletes who pair a chest strap for serious interval training but want AW polish otherwise
Skip it if
  • Serious multi-day endurance athletes needing Garmin-level battery life and raw sports data
  • Runners chasing max HR precision during intervals without a chest strap
Get the Fenix 8 if
  • ✓Hikers, divers, and outdoor athletes who want rugged multisport tracking with solar/long battery options
  • ✓Upgraders from older Fenix/Forerunner models wanting AMOLED or MIP display choice, buttons, and a bigger sunlight-readable screen
  • ✓Users who value the flashlight, mic/speaker, and offline voice commands for daily and outdoor use
  • ✓Owners who prioritize build quality and QUICK-FIT strap swapping over chasing every new smartwatch feature
Skip it if
  • Buyers on a budget, since many feel the price hike isn't justified by the incremental upgrades
  • Anyone needing built-in LTE/cellular, which the Fenix 8 lacks and reviewers repeatedly flag as a dealbreaker

What Apple Watch Ultra 3 owners say

“I love my AWU1, but please make a round one!”
— samwcook21 on Reddit
“I have ultra 3 sleep with isuses very nice best”
— WeekendTall7500 on Reddit
“This has convinced me that I probably need a garmin. I take my Ultra 3 off after training and I hate smart watch features.”
— Few-Introduction5414 on Reddit

What Fenix 8 owners say

“Its amazing especially because it is an extremely dangerous sport when being a type 1 diabetic”
— @Tentoumushi69 on YouTube
“I came from Apple Watch to the Fenix 8 about 2 months ago, love it. Zero issues, zero bugs.”
— @rb3tactical145 on YouTube
“Price is ridiculous and the features do not justify it.”
— @bellosthomas on YouTube

Apple Watch Ultra 3 vs Fenix 8: frequently asked questions

Is the Apple Watch Ultra 3 or the Fenix 8 better?

Real owners lean toward the Fenix 8: 59% of 110 owners recommend it, vs 45% of 64 for the Apple Watch Ultra 3.

Who should get the Apple Watch Ultra 3?

Owners point the Apple Watch Ultra 3 at apple ecosystem users who want a smartwatch first, fitness tracker second, and runners and swimmers satisfied with solid (not Garmin-grade) HR and GPS accuracy.

Who should get the Fenix 8?

Owners point the Fenix 8 at hikers, divers, and outdoor athletes who want rugged multisport tracking with solar/long battery options, and upgraders from older Fenix/Forerunner models wanting AMOLED or MIP display choice, buttons, and a bigger sunlight-readable screen.

What do owners complain about?

The most-cited downside of the Apple Watch Ultra 3 is a recurring subset of owners end up switching to or preferring Garmin (Fenix 8, Enduro 3, Tactix 7) for serious training and fitness tracking, citing better dedicated sports features. For the Fenix 8, it's price is the single biggest complaint, many call the cost (often $1,000+) unjustified given how minor the upgrade feels.