UniJethro Smart Ring for Women & Men (Health Tracker Ring with Heart Rate, Blood Oxygen, Blood Pressure)
Quick take
UniJethro’s R11M smart ring is a lightweight health and sleep tracker that uses optical sensors plus movement tracking to monitor heart rate, blood oxygen, blood pressure, and sleep. It’s designed to be comfortable for all-day wear and rated IP68 for sweat and water exposure, and it aims for several days of use per charge. The biggest buying caveat is that real-world results depend heavily on getting the right fit and on stable app performance.
Pros and cons
Pros
- Tracks multiple health signals: heart rate, blood oxygen, blood pressure, plus sleep monitoring.
- Built-in accelerometer enables activity insights like steps, calories, and distance.
- Comfort-focused design with a resin plus stainless steel case, and a lightweight feel.
- IP68 waterproof rating for everyday water and hand-washing scenarios.
Cons
- App stability can be an issue, with some users reporting freezing if too many apps are open.
- Fit matters, since some buyers noted sizing can be tricky and affects comfort and sensor placement.
- Battery life is described as roughly 3-5 days regular use (and longer standby), which may not match heavier monitoring expectations.
What buyers think
Buyer-review evidence emphasizes comfort and everyday wear, with multiple reports describing the ring as lightweight, non-intrusive at work and during exercise, and holding up during regular routines. Setup and syncing are frequently described as straightforward, and buyers often highlight that the app shows both current and historical health or activity data.
On the downside, the most commonly relevant themes are practical fit and app behavior. Some shoppers mention that sizing may require attention, and at least one review flags app freezing when the phone is multitasking. Overall, buyer-review evidence suggests good day-to-day usability, but it also indicates you should plan to optimize finger size and manage phone app conditions for the smoothest experience.
Key features and what they mean in daily use
Health and sleep tracking
This smart ring targets several core health categories in one device: heart rate, blood oxygen, and blood pressure, plus sleep tracking. If your goal is to view trends around recovery and baseline wellness, these sensors and sleep analytics can make it easier to spot patterns over time rather than checking manually.
Activity insights without a bulky device
With a built-in accelerometer (SC7A20H) for motion sensing, the ring is positioned for step counting and workout-related metrics like calories burned and distance. It’s also described as suitable for activities such as running and cycling, and lighter movement like yoga, which matters if you want a ring-style tracker that you can keep on through your routine.
Water and sweat resistance (IP68)
IP68 waterproof protection is a practical benefit for everyday life. It’s intended to handle sweat and water exposure during hand washing, so you do not need to baby the ring every time you wash up. (If you do frequent deep-water activities, your comfort level may depend on how you treat device care, since the listing specifies “waterproof” and also references 100 meters.)
Battery and charging approach
The ring is rated for about 3-5 days of regular use, with up to 7-10 days in standby mode. It uses a charging cable and a charging case, and buyers specifically call out the portable charging station as convenient when traveling or away from a wall outlet.
Design, comfort, and sizing considerations
The R11M is built as a resin plus stainless steel case and is designed for secure, comfortable all-day wear. Since smart rings rely on sensor alignment with the finger, sizing is not just about comfort, it can impact how consistently measurements track. Some buyers note the ring can run small, and others mention needing a size adjustment for the right fit. If you’re between sizes, plan to treat sizing as part of the setup, not an afterthought.
App experience and data connections
The ring is intended to work with iPhone and Android devices and includes an app-free-subscription approach for accessing data. It also supports syncing to Apple Health and “fitness and activity” tracking integrations, so you can keep health data in a place you already use. One review notes the app can freeze when the phone has too many apps open, which is a reminder to close background apps if you want the smoothest monitoring experience.
Who this smart ring is best for
- People who want ring-style health tracking and prefer a lighter alternative to a smartwatch.
- Shoppers focused on sleep plus core wellness metrics like heart rate and blood oxygen, with blood pressure tracking also included.
- Users who value everyday water resistance and do not want to take the ring off for routine washing.
- Buyers who want travel-friendly charging (the portable charging case is a standout point in user comments).
Who should consider other options
- People who are very sensitive to app quirks and expect flawless performance even while multitasking.
- Buyers who don’t want to spend time dialing in fit, since comfort and sensor alignment depend on choosing the right size.
- Shoppers seeking ultra-precise medical-grade readings, because smart ring measurements are best treated as wellness and trend data rather than a replacement for clinical monitoring.
Pros and cons summary
- Pros: multi-metric health tracking (heart rate, blood oxygen, blood pressure), sleep analysis, activity insights, IP68 waterproof protection, and comfortable, lightweight ring design.
- Cons: app performance can be affected by phone multitasking, and sizing can require attention to get the best fit and sensing.
Price and availability
You can check the latest price and color availability on Amazon, since smart rings can vary by listing and size. Use the button below to confirm current options before purchasing.
Verdict
The UniJethro R11M is a solid choice for shoppers who want a comfortable, ring-based way to track sleep and everyday wellness signals like heart rate and blood oxygen, with blood pressure and activity metrics added for a fuller picture. It’s especially appealing if you want a budget-friendly smart ring experience with IP68 waterproof protection and portable charging. Just be prepared to take sizing seriously and to support smooth app performance on your phone for the most reliable day-to-day results.
FAQ
Is this smart ring compatible with iPhone and Android?
Yes. It’s designed to work with both iOS and Android devices.
Does it have a subscription fee for the app?
The product positioning emphasizes no app subscription fees for using the companion app.
How waterproof is the UniJethro smart ring?
It has an IP68 waterproof rating, intended for sweat and water exposure during everyday activities like hand washing.
How long does the battery last?
Battery life is listed as approximately 3-5 days of regular use, with up to 7-10 days in standby mode.
What does it track besides sleep?
Besides sleep tracking, it monitors heart rate, blood oxygen, and blood pressure, and it also uses movement sensing for activity insights such as steps, calories burned, and distance.
Is sizing important?
Yes. Because sensor readings depend on contact and alignment, choosing the right size for your finger can affect both comfort and how consistently measurements work.
Specifications
| Product Title | Smart Ring for Women & Men, Health Tracker Ring with Heart Rate, Blood Oxygen,Blood Pressure, IP68 Waterproof Fitness Ring, Sleep Tracker for iPhone and Android, No APP Fee (Black, 10#) |
|---|---|
| Category | Electronics > Wearable Technology > Rings |
| Brand | UniJethro |
| Manufacturer | Unijethro |
| Model Name | R11M |
| Model Number | R11M |
| Color | Black |
| Item Weight | 3.5 Grams |
| Operating System | Android, IOS |
| Additional Features | Data can be synced to Apple Health, Fitness and Activity Tracker, Blood Oxygen Monitor, Heart Rate Monitor, Sleep TrackerFitness and Activity Tracker, Sleep Tracker, Remote Photography, Family Care, Blood Pressure Monitor |
| GPS Geotagging Functionality | GPS Via Smartphone |
| Water Resistance Level | Waterproof |
| Sport Type | Cycling, Diving, Fitness, Hiking, Multi-Sports |
| Water Resistance Depth | 100 Meters |
| Metrics Measured | Heart rate, sleep, sleep patterns, blood oxygen, blood pressure, wave-to-snap, family care |
| Shape | Round |
| Style Name | Modern |
| Battery Capacity | 300 Milliamp Hours |
| Battery Cell Type | Lithium Polymer |
| Battery Average Life | 5 days |
| Compatible Phone Models | Android Devices, iOS Devices |
| Memory Storage Capacity | 32 MB |
| Target Audience | Unisex Adults |
| Age Range Description | Adult |
| Built-In Media | Charging Cable, Charging Case, Ring Protector, Smart Ring, User Manual |
| Warranty Description | 2 Year Manufacturer |
| Wearable Computer Type | Smart Ring |
Available variants
Color
- Rose Gold
- Silver
- Green
- Blue
- Lavender Pink
- Gold
- Black
- Orange
Size
- 13#
- 14#
- 6#
- 7#
- 8#
- 12#
- 10#
- 9#
- 11#
Recommended next
RingConn Gen 2, World’s First Smart Ring with Sleep Apnea Monitoring
RingConn Gen 2 is an ultra-thin smart ring aimed at people who want detailed sleep insights, including sleep apnea related metrics, without a monthly app subscription. It emphasizes comfort, long-ish battery life (size dependent), and waterproof daily wear, but it is not designed to replace wrist fitness wearables for every kind of workout or step accuracy.
RingConn Gen 2, World’s First Smart Ring with Sleep Apnea review
RingConn Gen 2 is a thin, subscription-free smart ring built for sleep-first health tracking, including sleep apnea and real-time AHI insights. It also tracks activity, heart rate, stress, and blood oxygen, with an app-based experience and a long (size-dependent) battery for multi-day wear, plus 100m water resistance.
SAMSUNG Galaxy Ring, AI Smart Ring, Size First w/Sizing Kit, review
Samsung’s Galaxy Ring is a lightweight titanium smart ring built for around-the-clock fitness and sleep tracking, designed to work with Android and the Samsung Health ecosystem. It’s positioned as a no-subscription option, but buyer reviews show the main tradeoff is reliability around battery performance over time for some users.
ESR for MagSafe Sticker, MagSafe Ring, 2 Pack Metal Ring for Phone case, Universal Wireless Charger Conversion Kit
The ESR MagSafe metal ring kit is designed to add MagSafe compatibility to many phone cases so you can use MagSafe chargers and accessories. It relies on strong adhesive placement (not repositioning), and the main tradeoff is that removal can be difficult, especially on rough or textured cases.