ZBNMY Smart Ring, Black, Size 11

Black Size: The ZBNMY Smart Ring is a screen-free wearable for sleep and activity tracking, with Bluetooth connectivity and compatibility claims for iOS and Android phones. The listing says there are no app subscription fees and claims 5–7 days of ring battery life, depending on use.

At a glance

Sleep tracking is described as recording deep and light sleep, eye movement and wakefulness in the app.
The listing claims heart-rate tracking throughout the day and activity tracking.
The app is advertised as having no subscription fee.
A portable charging case is claimed, with 5–7 days of ring use per charge depending on usage.

Price

$39.99Save 38%

Reference price: ~~$64.99~~

Price checked: Nov 14, 2026

View offer

Pros and cons

Pros

The no-subscription claim may suit buyers who want app access without an ongoing fee.
A screen-free, round ring form avoids adding a display to the wearable.
The listing claims both sleep indicators and heart-rate tracking in one wearable.

Cons

No display means readings and reports are viewed through a compatible phone rather than on the ring.

Technical specifications

16 specifications

Identity and fit
Brand	ZBNMY
Form factor	Round
Colour and size	Black,11

Display and tracking
Display	No Display
Activity feature	Activity Tracker
Listed health metric	Heart Rate
Supported application	Sleep Monitor

Connectivity and compatibility
Wireless connection	Bluetooth
Compatible phone systems	IOS,Android
Compatible device	Smartphone
GPS	No GPS

Protection
Water resistance listed	Waterproof
Water resistance depth	80 meters

Battery and charging
Ring battery life claim	5–7 days
Charging time claim	1–2 hours
Charging case battery capacity claim	500 mah

What to know before buying

Listing details to confirm

The listing is inconsistent about battery duration, stating 7 days in the title and 5–7 days depending on use elsewhere. Its waterproof and 80-meter details are not reconciled with the feature claim of IP68 and shallow swimming use. The size is shown as 11, but fit guidance relies on measuring a finger and comparing it with an image size chart. Confirm the selected size, charging-case package and water-use guidance before buying.

Who is it for?

A good fit for

Buyers wanting a screen-free ring for sleep and heart-rate tracking through an iOS or Android phone.
People seeking a wearable whose listing claims no app subscription fee.

Less suited to

Buyers who need on-ring readings or GPS tracking.
Anyone who needs a clearly specified water-resistance rating and use conditions before purchase.

ZBNMY Smart Ring, Black, Size 11 · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.8 / 5 · 101 ratings

5 stars92%92%
4 stars4%4%
3 stars2%2%
2 stars0%0%
1 star2%2%

Customer rating information is strongly positive overall, with most ratings in the five-star category, but a small share are one- or three-star ratings. With no written feedback supplied, these figures do not show what customers liked or disliked, or establish tracking accuracy, battery performance or fit.

Frequently asked questions

Does the ZBNMY Smart Ring require an app subscription?

The listing claims that app access and health data have no subscription fee.

How long does the ring last between charges?

The listing gives a 5–7 day battery-life claim depending on usage, while the title says 7 days. Treat runtime as usage-dependent.

Will it work with an iPhone or Android phone?

The listing says it is compatible with iOS and Android devices. It also specifies iOS 10.0 and Android 8.0 or newer.

How should I choose the ring size?

The listing recommends measuring the finger with its string method and comparing the result with the size chart in the images. The selected listing shows size 11.