Samsung

SAMSUNG SM-R390N Fitness Tracker

Fitness Tracker
Black
1.8 ounces

4.5/ 5 on Amazon2,446Amazon ratings1,000+bought last month4.2ProductDome score

Better rated than 84%
More reviewed than 64%

Medium confidenceLast refreshed Aug 4, 2026Amazon data + ProductDome analysis · methodology

Best forYou want a light, 50 gram tracker and already know Samsung's SM-R390N feature set

A lightweight Samsung fitness tracker at 50 grams, worth checking Samsung's own spec sheet for battery and sensor details before buying.

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ProductDome scorecard

How it ranks among the 44 fitness trackers we track

4.2/ 5ProductDome scoreMedium confidence

Owner satisfaction · 56% of scorecategory median 4.2★4.5

4.5★ across 2,446 Amazon ratings, Bayesian-smoothed toward the category average.

Evidence strength · 17% of scorecategory median 643 ratings4.2

2,446 Amazon ratings, weighted on a log scale so huge counts don't drown everything.

Buyer demand · 11% of score4.1

1,000+ bought on Amazon last month.

Data quality · 11% of score2.5

Brand identity, imagery, description and spec coverage.

The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 44 fitness trackers we track - how the scorecard works · full fitness trackers data report. Confidence: medium - useful but incomplete evidence.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.

Overview

The Samsung SM-R390N is a fitness tracker weighing 50 grams in a black finish, built for on-wrist activity tracking. Beyond the weight and color, the listing doesn't detail battery life, screen type, or sensor specs.

At 50 grams the tracker sits on the lighter end for wearables, which matters for all-day and overnight wear. Model number SM-R390N is the main identifier here since the listing doesn't include feature specifics like heart rate or sleep tracking.

50 gram weight
Black finish
Model SM-R390N
Wrist-worn fitness tracker

Who it's for

Suits anyone wanting a lightweight fitness tracker for daily wear. Not useful if you need confirmed specs like battery life or specific sensors before buying, since those aren't listed.

Strengths and trade-offs

Drawn from this product's published specifications.

What stands out

Light at 50 grams for all-day wear

What to check first

Battery life, sensors, and display specs not listed here

Performance notes

The main data point available is weight, and at 50 grams the SM-R390N is light enough for continuous wear without noticeable bulk on the wrist. Sensor, battery, and display details aren't part of this listing, so pull those from Samsung's official specs if they factor into your decision.

Specifications

Brand	Samsung
Model	SM-R390N
Color	Black
Item Weight	1.8 ounces

How it compares

This product against the closest alternatives we track in fitness trackers.

Product	Amazon rating	Ratings	ProductDome score
SAMSUNG SM-R390N Fitness TrackerThis product	4.5 / 5	2,446	4.2 / 5
XIAOMI BHR07PYGL Fitness TrackerXIAOMI	4.5 / 5	10,520	4.4 / 5
Garmin 010-02809-00 Fitness TrackerGarmin	4.7 / 5	1,974	4.4 / 5
Fitbit B0B5F9SZW7 Fitness TrackerFitbit	4.2 / 5	24,802	4.4 / 5
WHOOP 973-002-000 Fitness TrackerWHOOP	4.3 / 5	3,754	4.3 / 5

Frequently asked

Questions about the Samsung SM-R390N

Common buyer questions answered straight from the product spec data - no fluff, no "it depends".

How much does the Samsung SM-R390N weigh?

50 grams.

What color is the Samsung SM-R390N fitness tracker?

Black.

Does the listing include battery life for the SM-R390N?

No, battery life and sensor details aren't specified in the available data.