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The short answer · Balanced overview
Samsung Galaxy Watch9 (40 mm) leads the Balanced Bettr Score 61.4–56.5. The existing category models use the available evidence automatically; open the score details for sources and coverage.
Samsung
The 1.57 in Galaxy Watch record is a specific size choice. Check compatibility, features, and battery claims before deciding whether that format suits your routine. The catalog specifies a listed weight of 1.06 oz and a manufacturer battery claim of up to 40.08 hours.
Bettr Score · Balanced
61.4/100
Start with what you want the tracker to do. Inspect the listed phone compatibility, features, and membership requirements before deciding what belongs in your day. The catalog specifies a listed weight of 0.42 oz and a manufacturer battery claim of up to 7 days.
Bettr Score · Balanced
56.5/100
15 shared verified specifications. The Bettr Score uses the available evidence automatically; independent tracking accuracy is not inferred from sensor presence.
| Samsung Galaxy Watch9 (40 mm) | Specification | Google Fitbit Air |
|---|---|---|
$379.99 Manufacturer source · 2026-09-10US manufacturer reference price or launch MSRP; not a live retailer offer. | Reference price | $99.99 ✓ WinnerManufacturer source · 2026-09-10US manufacturer reference price or launch MSRP; not a live retailer offer. |
smartwatch Manufacturer source · 2026-09-10 | Device typePersonal preference | fitness-tracker Manufacturer source · 2026-09-10 |
1.67 days Manufacturer source · 2026-09-10 | Advertised battery life | 7 days ✓ WinnerManufacturer source · 2026-09-10 |
1.06 oz Manufacturer source · 2026-09-10 | Device weight | 0.42 oz ✓ WinnerManufacturer source · 2026-09-10 |
164 ft Manufacturer source · 2026-09-10 | Water resistanceTie | 164 ft Manufacturer source · 2026-09-10 |
Yes ✓ WinnerManufacturer source · 2026-09-10 | Built-in GPS | No Manufacturer source · 2026-09-10 |
Yes Manufacturer source · 2026-09-10 | Continuous heart rateTie | Yes Manufacturer source · 2026-09-10 |
Yes ✓ WinnerManufacturer source · 2026-09-10 | ECG capability | No Manufacturer source · 2026-09-10 |
Yes Manufacturer source · 2026-09-10 | Blood oxygen sensingTie | Yes Manufacturer source · 2026-09-10 |
Yes ✓ WinnerManufacturer source · 2026-09-10 | Temperature sensing | No Manufacturer source · 2026-09-10 |
Yes Manufacturer source · 2026-09-10 | Sleep trackingTie | Yes Manufacturer source · 2026-09-10 |
Yes ✓ WinnerManufacturer source · 2026-09-10 | On-device display | No Manufacturer source · 2026-09-10 |
No Manufacturer source · 2026-09-10 | iPhone supportPersonal preference | Yes Manufacturer source · 2026-09-10 |
Yes Manufacturer source · 2026-09-10 | Android supportTie | Yes Manufacturer source · 2026-09-10 |
None Manufacturer source · 2026-09-10 | Required subscriptionTie | None Manufacturer source · 2026-09-10 |
Bettr Score
Samsung Galaxy Watch9 (40 mm)
61.4 / 100
Google Fitbit Air
56.5 / 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 Samsung Galaxy Watch9 (40 mm)’s score details, sourced features and compatibility for your needs.
Review Google Fitbit Air’s score details, sourced features and compatibility for your needs.
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