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The short answer · Balanced overview
Fitbit Charge 6 leads the Balanced Bettr Score 71.6–57.6. 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
Start with the functions you want from a fitness tracker. Check this Charge 6 model’s phone compatibility, membership details, and battery claims against your routine. The catalog specifies a listed weight of 1.06 oz and a manufacturer battery claim of up to 7 days.
Bettr Score · Balanced
71.6/100
14 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 | Fitbit Charge 6 |
|---|---|---|
$799 Manufacturer source · 2026-09-10US manufacturer reference price or launch MSRP; not a live retailer offer. | Reference price | $159.95 ✓ 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 typePersonal preference | fitness-tracker Manufacturer source · 2026-10-18 |
2.08 days Manufacturer source · 2026-09-10 | Advertised battery life | 7 days ✓ WinnerManufacturer source · 2026-10-18 |
2.17 oz Manufacturer source · 2026-09-10 | Device weight | 1.06 oz ✓ WinnerManufacturer source · 2026-10-18 |
328.1 ft ✓ WinnerManufacturer source · 2026-09-10 | Water resistance | 164 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 capabilityTie | Yes Manufacturer source · 2026-10-18 |
Yes Manufacturer source · 2026-09-10 | Blood oxygen sensingTie | Yes Manufacturer source · 2026-10-18 |
Yes Manufacturer source · 2026-09-10 | Temperature sensingTie | Yes Manufacturer source · 2026-10-18 |
Yes Manufacturer source · 2026-09-10 | Sleep trackingTie | Yes Manufacturer source · 2026-10-25Manufacturer lists automatic sleep duration and light, deep, and REM sleep-stage tracking. |
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 subscriptionNot enough data | Not stated / not applicable |
Bettr Score
Apple Watch Ultra 4
57.6 / 100
Fitbit Charge 6
71.6 / 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 Fitbit Charge 6’s score details, sourced features and compatibility for your needs.
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