Samsung Galaxy Fit 3 Fitness Tracker 40mm
- 13 day battery life, 208 milliamp hour cell
- 1.6 inch display, 320 x 320
- No GPS in the GPS field
- 1.5 meter water depth rating
- Sleep duration and blood oxygen measured
- Aluminum case, 50 gram weight
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A basic tracker for sleep and blood oxygen with a long battery, paired to iOS or Android phones. It lists no GPS and only a shallow water rating, so it suits daily wear rather than swimming.
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ASIN: B0CTCLBST5Model: SM-R390NCategory: Fitness Trackers
Overview
Samsung built the SM-R390N as a fitness tracker with an aluminum case, a silicone band and buttons plus touch control. It pairs over Bluetooth with iOS and Android phones and tablets, and the listing includes a charging cable.
A long battery and a sleep and oxygen focus cover everyday wear. The limitation is mixed data: the GPS field says none while the navigation field lists GPS, and the water rating is shallow.
Who it's for
Overnight tracking and general activity logging are the setting, with a phone or tablet nearby. Anyone who wants route mapping, deep water use or a long list of workout modes should look at another type of watch.
Pros and cons
- Long battery life
- Sleep and oxygen metrics
- Works with iOS and Android
- Charging cable and guide included
- GPS fields contradict each other
- Shallow water depth rating
- Short metrics list
- Small internal memory
Performance notes
Overnight readings depend on the band sitting snug against the wrist. Battery life falls with more screen use and alerts. Without confirmed GPS, distance is estimated from motion, so route accuracy is limited.
Where it stands among fitness trackers
- 13 days battery average life: longer than 73% of the fitness trackers we list.
From the specs of the 43 fitness trackers we list; not a test result.
Specifications
| Brand | Samsung |
|---|---|
| Model | SM-R390N |
| Dimensions & fit | |
| Water Resistance Depth | 1.5 meters |
| Screen size | 1.6 inches |
| Band Length | 210 millimeters |
| Item Weight | 50 grams |
| Item Dimensions | 1.81 x 0.71 x 0.43 inches |
| Sim Card Size | eSIM |
| Capacity & performance | |
| Battery Capacity | 208 milliamp hourslower than 52% of 28 fitness trackers |
| Memory Storage Capacity | 16 MBlower than 84% of 26 fitness trackers |
| Power & efficiency | |
| Battery Average Life | 13 dayshigher than 73% of 27 fitness trackers |
| Battery Cell Type | Other Than Listed |
| Construction & materials | |
| Band Material Type | Silicone |
| Case Material Type | Aluminum |
| Band Color | Gray |
| Color | Black |
| Compatibility & installation | |
| Compatible Phone Models | Compatible with iOS and Android devices |
| Connectivity Technology | Bluetooth |
| Human Interface Input | Buttons |
| Compatible Devices | Smartphone, Tablet |
| Included components | |
| Unit Count | 1.0 Count |
| Warranty & support | |
| Supported Application | Fitness Tracker, Sleep Monitor |
| Warranty Type | Limited |
| Other details | |
| Gps Geotagging Functionality | No GPS |
| Display Type | Digital |
| Resolution | 320 x 320 |
| Control Type | Touch Control |
| Builtin Media | Fit, Charging cable and Quick Start guide |
| Metrics Measured | Sleep duration, blood oxygen monitor |
| Additional Features | Sleep Monitor, Time Display |
| Clasp Type | Buckle |
| Operating System | Android Wear |
| Shape | Rectangular |
| Sport Type | Multi-Sports |
| Style Name | Modern |
| Target Audience | Unisex Adults |
| Water Resistance Level | Water Resistant |
| Waterproof Rating | IP68 |
| Wearable Computer Type | Activity Tracker |
| Wireless Provider | Unlocked |
Closest rivals on specs
Zeacool Fitness Tracker Smart Watch IP68- Battery Capacity 208 vs 180 mAh (+16%)
WHOOP 5.0 MG Activity Tracker- Item Weight 0.11 vs 0.16 pounds (-31%)
XIAOMI Smart Band 10 Fitness Watch M2457B1- Memory Storage Capacity 0.02 vs 0.06 GB (-75%)
- Battery Capacity 208 vs 233 mAh (-11%)
- Item Weight 0.11 vs 0.04 pounds (+175%)
Frequently asked questions
How do I care for the Samsung SM-R390N?
No care instructions are listed. The water depth rating is only 1.5 meters, so ask the seller before swimming or showering with it.
Does the Samsung SM-R390N have GPS?
The GPS field says no GPS, although the satellite navigation field lists GPS. Treat it as having no built-in GPS and confirm with the seller.
Which phones work with the Samsung SM-R390N?
The listing says it is compatible with iOS and Android devices, including smartphones and tablets, over Bluetooth.
What comes in the Samsung SM-R390N box?
The tracker, a charging cable and a Quick Start guide.