New prices
€185
– €195
Fitbit FB521GLBM-US Advanced Health and Fitness Smartwatch
This advanced health and fitness smartwatch offers comprehensive wellness monitoring with features like all-day stress detection using cEDA technology, an ECG app for atrial fibrillation assessment, and personalized sleep profiles. It includes built-in GPS for tracking activities, a workout intensity map, and a battery life exceeding six days. The device provides detailed health insights, supports various exercise modes, and offers connectivity options for calls, texts, and notifications. It is water-resistant and customizable with interchangeable clock faces.
- 3 variants
- All-day stress detection with cEDA
- batteries: 2 variants
Used prices
€158
– €171
Price spread
~5%
Across new variants
Customer rating
10,211 ratings
Available variants (3)
Choose a variant, then open its detail page for seller-specific information.
7.05 ounces
Amazon
Available to order
- Product Dimensions
- 1.57 x 0.47 x 1.57 inches; 7.05 ounces
- batteries
- 1 LR44 batteries required. (included)
6.74 ounces, mens
Amazon
Available to order
- Product Dimensions
- 1.57 x 0.47 x 1.57 inches; 6.74 ounces
- batteries
- 1 Lithium Ion batteries required. (included)
1.3 ounces
Amazon
Available to order
- Product Dimensions
- 1.57 x 0.47 x 1.57 inches; 1.3 ounces
- batteries
- 1 Lithium Ion batteries required. (included)
Variant comparison
Compare prices, availability, and key variant differences in one table.
| Feature | 7.05 ounces | 6.74 ounces, mens | 1.3 ounces |
|---|---|---|---|
| Price | €195.01 | €195.01 | €185.11 |
| Updated | Sep 2, 2026 | Aug 31, 2026 | Sep 2, 2026 |
| Availability | Available to order | Available to order | Available to order |
| Product Dimensions | 1.57 x 0.47 x 1.57 inches; 7.05 ounces | 1.57 x 0.47 x 1.57 inches; 6.74 ounces | 1.57 x 0.47 x 1.57 inches; 1.3 ounces |
| batteries | 1 LR44 batteries required. (included) | 1 Lithium Ion batteries required. (included) | 1 Lithium Ion batteries required. (included) |
Amazon live offers
Offers updated
Top live offer
€185.11
New from
€185.11
Used from
€157.51
Offer count
30+
| Seller | Condition | Price | Shipping | Updated | |
|---|---|---|---|---|---|
| Third-party seller FBA | Used - Good | €157.51 | Free shipping | 9/2/26 | View offer |
| Third-party seller FBA | Used - Very Good | €161.99 | Free shipping | 9/2/26 | View offer |
| Third-party seller FBA | Used - Very Good | €166.33 | Free shipping | 9/2/26 | View offer |
| Third-party seller FBA | Used - Like New | €167.05 | Free shipping | 9/2/26 | View offer |
| Third-party seller FBA | Used - Good | €171.48 | Free shipping | 9/2/26 | View offer |
| Third-party seller FBA | Used - Like New | €171.63 | Free shipping | 9/2/26 | View offer |
| Third-party seller FBA | Used - Very Good | €173.35 | Free shipping | 9/2/26 | View offer |
| Third-party seller FBA | New | €185.11 | Free shipping | 9/2/26 | View offer |
| Third-party seller | New | €185.95 | Free shipping | 9/2/26 | View offer |
| Third-party seller | New | €189.37 | Free shipping | 9/2/26 | View offer |
View all offers on Amazon
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Overview
Compare Fitbit FB521GLBM-US Advanced Health and Fitness Smartwatch variants, pricing tiers and key differences.
Learn moreHow variants differ
- Product Dimensions
- batteries
Who each variant is for
- Start with your budget: the visible price spread across variants is about 5%.
Reviews
4.1 / 5
from 10,211 ratings
No written reviews yet
When this device makes sense
Product confidence
Reviews
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