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The short answer · Balanced overview
Garmin Instinct 3 AMOLED (45 mm) leads the Balanced Bettr Score 68.1–57.6. The existing category models use the available evidence automatically; open the score details for sources and coverage.
Apple
Before choosing the Ultra, make the comparison about your own use. Inspect its listed size-related details, features, and ownership requirements rather than deciding on the name. The catalog specifies a listed weight of 2.17 oz and a manufacturer battery claim of up to 2.08 days.
Bettr Score · Balanced
57.6/100
Garmin
Keep the 1.77 in AMOLED version exact. The listed display, compatibility, and battery claims help you compare the ownership routine as well as the feature list. The catalog specifies a listed weight of 1.87 oz and a manufacturer battery claim of up to 18 days.
Bettr Score · Balanced
68.1/100
13 shared verified specifications. The Bettr Score uses the available evidence automatically; independent tracking accuracy is not inferred from sensor presence.
| Apple Watch Ultra 4 | Specification | Garmin Instinct 3 AMOLED (45 mm) |
|---|---|---|
$799 Manufacturer source · 2026-09-10US manufacturer reference price or launch MSRP; not a live retailer offer. | Reference price | $349.99 ✓ WinnerManufacturer source · 2026-10-18Manufacturer USD reference price retrieved 2026-10-18; taxes/shipping and conditional discounts excluded. |
smartwatch Manufacturer source · 2026-09-10 | Device typeTie | smartwatch Manufacturer source · 2026-10-18 |
2.08 days Manufacturer source · 2026-09-10 | Advertised battery life | 18 days ✓ WinnerManufacturer source · 2026-10-18 |
2.17 oz Manufacturer source · 2026-09-10 | Device weight | 1.87 oz ✓ WinnerManufacturer source · 2026-10-18 |
328.1 ft Manufacturer source · 2026-09-10 | Water resistanceTie | 328.1 ft Manufacturer source · 2026-10-18 |
Yes Manufacturer source · 2026-09-10 | Built-in GPSTie | Yes Manufacturer source · 2026-10-18 |
Yes Manufacturer source · 2026-09-10 | Continuous heart rateTie | Yes Manufacturer source · 2026-10-18 |
Yes Manufacturer source · 2026-09-10 | ECG capabilityNot enough data | Not stated / not applicable |
Yes Manufacturer source · 2026-09-10 | Blood oxygen sensingTie | Yes Manufacturer source · 2026-10-18 |
Yes Manufacturer source · 2026-09-10 | Temperature sensingNot enough data | Not stated / not applicable |
Yes Manufacturer source · 2026-09-10 | Sleep trackingTie | Yes Manufacturer source · 2026-10-18 |
Yes Manufacturer source · 2026-09-10 | On-device displayTie | Yes Manufacturer source · 2026-10-18 |
Yes Manufacturer source · 2026-09-10 | iPhone supportTie | Yes Manufacturer source · 2026-10-18 |
No Manufacturer source · 2026-09-10 | Android supportPersonal preference | Yes Manufacturer source · 2026-10-18 |
None Manufacturer source · 2026-09-10 | Required subscriptionTie | None Manufacturer source · 2026-10-25Required fee for core device and Garmin Connect use is $0. Optional Garmin Connect+ premium features remain paid; this does not imply all services or features are free. |
Bettr Score
Apple Watch Ultra 4
57.6 / 100
Garmin Instinct 3 AMOLED (45 mm)
68.1 / 100
Evidence-based guidance · Balanced model
One Bettr Score, using the existing category and priority models. Complete comparable independent tests take precedence; otherwise verified published specifications supply the score. Evidence and coverage are shown in the score details. Scores stay fixed across opponents; compare them within the same product group.
Review Apple Watch Ultra 4’s score details, sourced features and compatibility for your needs.
Review Garmin Instinct 3 AMOLED (45 mm)’s score details, sourced features and compatibility for your needs.
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