1 / 7

Product guide

REWSX Smart Ring, Gold, US Size 9

Gold Size: The REWSX smart ring is a no-display activity and sleep tracker intended to pair with a smartphone. It claims sleep, heart-rate, blood-oxygen and activity tracking without an app subscription, with a charging case included in the stated package contents.

At a glance

Sleep summaries are described as viewable in the app by day, week and month, including sleep timing and light and deep sleep.
The listing claims continuous heart-rate and blood-oxygen monitoring, plus step, calorie and distance tracking.
Sport modes named in the listing include walking, running, cycling, hiking, yoga and golf.
The app is described as having lifetime access without a subscription fee.
Ring sizing follows US sizes. The listing recommends sizing down if using its circumference-measurement method, which may read slightly large.

Price

$42.61Save 28%

Reference price: ~~$58.98~~

Price checked: Nov 14, 2026

View offer Ahead of Black FridayExplore the selection

Pros and cons

Pros

No display keeps the tracking experience centered on the companion app rather than on-screen controls.
A charging case is listed, and the seller claims it can recharge the ring about 15 times.
The stated feature set combines sleep, health and everyday activity tracking in a ring format.

Cons

The ring has no display, so the listing directs users to the smartphone app to view tracking data.
The claimed ring battery life is 3-5 days, so regular recharging is part of use.

Technical specifications

20 specifications

Identity
Brand	REWSX
Model	smart ring
Color	Gold
Listed size	9#

Display
Screen technology listed	No Display

Connectivity and compatibility
Wireless connection listed	Bluetooth
Compatible phones	Android Devices, iOS Devices
GPS	GPS Via Smartphone

Tracking and features
Special features	Activity Tracker, Lightweight, Multisport Tracker, Sleep Monitor, Slim Design
Supported application	Fitness Tracker
Metrics listed	Heart Rate Monitor

Power and battery
Battery type	Lithium Ion
Claimed ring battery life	3-5 days
Claimed charge time	2 hrs
Charging case battery capacity	400 mah

Form and protection
Form factor	Round
Water resistance listed	Waterproof
Water resistance depth listed	50 meters
Waterproof rating listed	IP68

Software
Operating system listed	Android Wear 2.9

What to know before buying

Listing details to confirm

The listing is inconsistent about water protection: it separately says Waterproof, IP68 and 50 meters, but does not explain the relationship between those claims. Treat the actual water-use rating as unconfirmed. It also lists Android Wear 2.9 for a ring that is described as pairing with Android and iOS phones, without clarifying the software role. Battery claims of 3-5 days per charge and up to 60 days with the case refer to different configurations. Confirm sizing against the chart and chosen listing before ordering.

What’s in the box

Included

Smart ring
Charging cable
Charging case
User manual

Who is it for?

A good fit for

Buyers who want sleep and activity summaries in a companion app rather than on a ring display.
People looking for a smart ring whose listing claims no app subscription and includes a charging case.
Users with a compatible iOS or Android smartphone who want basic activity and health tracking in a ring form.

Less suited to

Buyers who need to read metrics directly on the wearable.
Anyone who needs a clearly documented water-use rating or independently established tracking accuracy.

REWSX Smart Ring, Gold, US Size 9 · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 68 ratings

5 stars79%79%
4 stars9%9%
3 stars4%4%
2 stars6%6%
1 star2%2%

Customer feedback highlights the ring's appearance and comfort, with positive reports about sleep and heart-rate tracking, functionality and battery life. This aligns with the app-based health and activity features claimed in the listing, but does not establish tracking accuracy or confirm the stated battery duration. The rating distribution is mostly five-star, with a smaller range of lower ratings, so experiences are not uniformly positive.

Positive themes

Customers reportedly like the design and comfort.
Customer feedback describes sleep and heart-rate tracking positively.
Customers reportedly appreciate its functionality and battery life.

Frequently asked questions

Does the ring have a screen?

No. The listing specifies No Display and describes viewing tracking information in the smartphone app.

Does it require a subscription?

The listing claims lifetime free access to its health app without subscription fees.

How long does the battery last?

The listing claims 3-5 days of ring use after a 2-hour charge. It also claims the 400 mah charging case can recharge the ring about 15 times, but does not establish a single unconditional total-use figure.

What phones does it work with?

The listing names Android and iOS devices and gives Android 4.4 / iOS 8.4 or above as compatible versions.

What water protection should I expect?

The listing gives three separate claims: Waterproof, IP68 and 50 meters. It does not explain how they relate, so the specific water-use rating remains unclear.