Wrongduck Nebula Smart Ring – Health, Sleep & Activity Tracker
How it works
If your product is accidentally damaged within two years, Care+ includes one replacement. Claims are handled directly by Wrongduck. View plan terms.
Optional Care+. One plan per product.
Pairs well with
Size chart
WRONGDUCK SIZE GUIDE
Find your best ring size
Click Find My Size to measure online in a few simple steps. You’ll get your recommended Wrongduck ring size instantly—no chart matching needed.
Wrongduck ring size chart
Choose the store size that matches your measured diameter or circumference.
| Store size | Diameter | Circumference | ISO / EU | UK |
|---|---|---|---|---|
| 6 | 16.5 mm | 51.8 mm | 52 | L ½ |
| 7 | 17.3 mm | 54.4 mm | 54 | N ½ |
| 8 | 18.1 mm | 56.9 mm | 57 | P ½ |
| 9 | 18.9 mm | 59.5 mm | 59 | R ½ |
| 10 | 19.7 mm | 62.0 mm | 62 | T ½ |
| 11 | 20.5 mm | 64.5 mm | 65 | V ½ |
| 12 | 21.4 mm | 67.1 mm | 67 | X ½ |
| 13 | 22.2 mm | 69.7 mm | 70 | Z1 |
| 14 | 23.0 mm | 72.2 mm | 72 | Z3 |
Between sizes? Choose the larger size for a more comfortable fit. Availability varies by ring model.
Measure with paper or thread
- Wrap a narrow strip of paper or non-stretch thread around the base of your finger.
- Keep it comfortably snug without squeezing your finger.
- Mark where the two ends meet.
- Lay it flat and measure the marked length in millimetres.
- Match that circumference to the chart above.
Measure at the end of the day when your hands are at a normal temperature, and repeat the measurement twice.
Shipping Information
Before the shipping,please allow us 1-2 business days for processing your order, timing depends on the actual situation.
Once your order has been shipped, we will immediately provide you with tracking information. Delivery times vary by region, Orders typically take 4-10 days to arrive.
How much is the subscription fee?
No subscription required. With a one-time purchase, you get full access to all health tracking features.
Package List
Smart Ring*1
Charging case *1
Charging cable *1
User manual *1
Wrongduck App Download
Looking for the correct app for your Wrongduck Smart Ring? Visit our Wrongduck App Download page, select your Smart Ring model, and download the compatible app for your device.
Wellness Tracking with an Ocean-Inspired Finish
The Wrongduck Nebula Smart Ring combines everyday sleep and activity tracking with a distinctive jewelry-inspired design. Its colorful natural shell inlay creates an elegant look for work, travel, exercise and daily wear.
Why Choose the Nebula?
- Sleep Tracking: Review your sleep patterns and nightly wellness information through the companion app.
- Daily Activity Tracking: Follow steps and everyday movement without wearing a bulky smartwatch.
- Heart Rate Tracking: View heart rate information and changes over time from your phone.
- Temperature Trends: Review recent body temperature changes through the synced mobile app.
- IP68 Water Resistance: Designed to handle normal daily exposure to water.
Designed to Look Like Jewelry
The Nebula features a genuine abalone shell inlay with natural shades of blue and green. The colorful finish gives the ring a distinctive appearance while keeping its wellness sensors discreetly integrated inside.
Because genuine shell is a natural material, its color, pattern and texture may vary slightly between individual rings. These variations are part of the material’s natural character.
Comfortable for Everyday Wear
The titanium steel frame provides a polished exterior, while the smooth resin interior is designed for comfortable contact with your finger. Its screen-free design records wellness information without distracting you with constant notifications.
Understand Your Daily Patterns
Wear the Nebula during the day to follow steps and activity information, then wear it overnight to review your sleep patterns. Sync the ring with the companion app whenever you want to check your recent data and long-term trends.
Product Details
- Outer materials: Titanium steel and genuine abalone shell
- Inner material: Smooth epoxy resin with visible circuitry design
- Water resistance: IP68 rating
- Compatibility: iOS and Android smartphones
- Available designs: Nebula and Galaxy
What’s Included
- Wrongduck Nebula Smart Ring
- Charging case
- Charging cable
- User manual
Please note: Wellness readings are intended for general informational and lifestyle purposes. This product is not a medical device and should not be used to diagnose, treat or prevent any medical condition.
Wrongduck Nebula Smart Ring – Health, Sleep & Activity Tracker
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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14 day return policy
We have a 14-day return policy, which means you have 14 days after receiving your item to request a return.
For details, please see: Return Policy -
Shipping Information
Processing Time:
- Before the shipping,please allow us 1-2 business days for processing your order, timing depends on the actual situation(Public Holidays/Weekends excluded)
Shipping Time（Estimate）:
- Standard Shipping Fee: $5.99 per order.
- Free Shipping: Orders over $49.99.
- Delivery times vary by destination:
- Europe: 4-9 business days
- United States: 5-8 business days
- Australia & Canada: 5-10 business days
- Other Regions: 4-12 business days
For details, please see: Shipping policy
I’m still learning things. For example I thought I had to connect it to my iPhone but I that is unnecessary and actually screws things up for the iPhone’s health app and the ring. I just figured that out today and now basically they record similars steps and miles. I find the sleep app very helpful and am learning a lot about my sleep habits from that. I find it reassuring that both my iPhone and the ring are very close in their recordings of my walking. I am enjoying using it and learning as I go along.
The WrongDuck Luck Ring may have an unusual name, but it delivers a thoughtfully designed and surprisingly capable health-tracking experience. The companion app is visually appealing, featuring calming colors and an intuitive layout that makes navigating your health data effortless. The ring itself is lightweight and comfortable enough to wear throughout the day and night.
What impressed me most was how quickly I became engaged with the wealth of health insights available. The Luck Ring tracks heart rate, stress levels, sleep quality, deep sleep, REM sleep, and several other wellness metrics, providing a fascinating glimpse into daily health patterns.
Battery performance has been solid, and the app conveniently alerts me when it's time to recharge. Charging is flexible, with both a dedicated charging case and a magnetic charging cable included. In my experience, the ring charges more reliably with a lower-wattage charger than with high-powered fast chargers.
Even a family member who owns a significantly more expensive health ring commented on the attractive design and soothing color scheme of the Luck Ring app. For the best results, I recommend wearing the ring on the index finger of your non-dominant hand with a snug—but not tight—fit. Ring sizing assistance is available at many retail locations, making it easier to find the correct size before purchasing.
Overall, the WrongDuck Luck Ring combines comfort, ease of use, and comprehensive health tracking into an impressive package that exceeds expectations.
wanted to really love this smart ring but it is incredibly inaccurate on every level and won't even hold a charge for even 24 hrs.
I reached out to customer service to request a refund and they got back to me within 24 hrs. I am very impressed in how they handled the matter on every level.
The inlay has an overlap that feels like it could come off. The ring is pretty, but not sure it will be durable.
Thank you for your feedback. The inlay on this ring is made from natural abalone shell, so each ring is unique. Slight variations in the shell edges, pattern, and where the natural pieces meet can occur and are part of the characteristics of genuine shell material. That said, the inlay should remain secure during normal wear. If you notice any actual lifting or loosening, please reach out to us and we’ll be happy to take a closer look and help resolve it.
The ring is just great! Tracks my steps and sleep and so many other things. I had been using an Apple Watch but that wasn’t holding a charge very well anymore. The ring holds a charge very well.
I'm quite impressed with the Nebula Smart Ring. It's comfy & attractive to wear and has all the features the more expensive rings have.
Hoping they are still working on the app. Not so easy to find what percentage it is charged before I get a warning or while it is charging.
The ring does not stay charged. As long as I thought it would. It is very pretty though. It doesn't want to stay connected to my phone for some reason
Hi Tina, thank you for your feedback, and we’re glad you like the look of the ring! We’re sorry to hear about the battery life and connection issues. This doesn’t sound like the experience we want you to have, and we’d like to help check what’s causing it. Please contact our support team with your phone model, and we’ll work with you to get this resolved.
Love my ring..does more tracking then I thought. Thank you
Very happy with my purchase. My fiancé and I love it.
Very pretty. Great fit!
Loved the look and this one works unlike others i have purchased