Price range
€178
– €188
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 offers
- All-day stress detection with cEDA
- Product Dimensions: 3 variants
Price spread
~6%
Across listed offers
Customer rating
10,271 ratings
Available offers (3)
Choose an offer, then open its detail page for seller-specific information.
7.05 ounces
Retailer
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
Retailer
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
Retailer
Available to order
- Product Dimensions
- 1.57 x 0.47 x 1.57 inches; 1.3 ounces
- batteries
- 1 Lithium Ion batteries required. (included)
Offer comparison
Compare prices, availability, and key variant differences in one table.
| Feature | 7.05 ounces | 6.74 ounces, mens | 1.3 ounces |
|---|---|---|---|
| Price | €177.94 | €187.77 | €177.94 |
| Updated | Sep 14, 2026 | Oct 1, 2026 | Sep 17, 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) |
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| Brand | Fitbit | FITVII | Apple | Apple | Fitbit | Apple |
| Model | FB521GLBM-US | HM57 | MR8W3LW/A | MWXF3LW/A | 6514035 | MR9C3LW/A |
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| Price | €177.94 | €44.49 | €296.49 | €433.74 | €168.18 | €295.89 |
| Seller | Retailer | Retailer | Retailer | Retailer | Retailer | Retailer |
| Update | May 13, 2026 | Jun 24, 2026 | Mar 21, 2026 | Mar 21, 2026 | Jun 24, 2026 | Mar 29, 2026 |
| batteries | 1 Lithium Ion batteries required. (included) | 1 Lithium Ion batteries required. (included) | 1 Lithium Ion batteries required. (included) | 1 Lithium Ion batteries required. (included) | ||
| manufacturer | Fitbit Inc | FITVII | Apple | Apple | Apple | |
| Country of Origin | China | China | China | Vietnam | ||
| Product Dimensions | 1.57 x 0.47 x 1.57 inches; 1.3 ounces | 9.53 x 3.07 x 1.3 inches | 24 x 7.7 x 3 inches | 9.53 x 3.07 x 1.3 inches | ||
| Date First Available | September 23, 2022 | April 22, 2024 | February 1, 2024 | September 9, 2024 | February 1, 2024 | |
| department | mens | mens | mens | |||
| Item Weight | 1.34 ounces | 4.8 ounces | 8.1 ounces | |||
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