94%
Said sharing HRV and recovery data with their partner helped them stay accountable.
Built for Two. Engineered for Accountability.
Included at no extra cost with the Complete Protocol, both Yakuru Ultra Rings are designed for accountability duos who want real data, real results, and a shared journey.
Battery Life
Up to 7 days
Material
Scratch-resistant titanium
Waterproof
100m depth (swim & shower safe)
Compatibility
iOS, Android, Yakuru Track
Sizes
8 Options for precise fit
Connectivity
Bluetooth Low Energy
| FEATURE |  Yakuru Ultra Ring
|  Whoop
|  Oura Ring
|  Apple Watch
|
|---|---|---|---|---|
| Glucose Estimation Without a Patch ¹ | Yes | No | No | No |
| Jet Lag Protocol ² | Yes | No | No | No |
| Strain Score ³ | Yes | Yes | No | No |
| Recovery Score | Yes | Yes | Yes | No |
| Sleep Score | Yes | Yes | Yes | Yes |
| Cycle & Hormonal Tracking | Yes | Yes | Yes | Yes |
| VO₂max | Yes | Yes | Yes | Yes |
|
Share Data with Partner, Trainer or Medical Professional | Yes | Yes | Yes | Yes |
| Screen-Free Ring | Yes | No | Yes | No |
| Week-Long Battery ⁴ | Yes | Yes | Yes | No |
| Works with iPhone and Android | Yes | Yes | Yes | No |
| Free Subscription With Purchase ⁵ | Yes | No | No | Yes |
| Every Feature Included, No Paid Tiers ⁶ | Yes | No | No | Yes |
Oura shows glucose only through a separate Dexcom Stelo patch, US only. Whoop measures glucose through blood draws (Advanced Labs), not from the device.
Whoop alerts you after you land and offers AI chat tips. No adjustment plan before departure.
All-day strain. Apple Watch rates individual workouts (Training Load). Oura has no strain score.
Apple Watch is rated for 24 hours and needs charging before every night of sleep tracking.
The Whoop device only works with a paid membership ($199-$359/year). Oura requires a membership for full app features.
Whoop gates Healthspan and Stress Monitor behind Peak, and ECG and Blood Pressure behind Life, which ships different hardware.
Competitor data verified August 2026 against WHOOP 5.0 / MG, Oura Ring 5 and Apple Watch on watchOS 26.
Train Together.
Recover Together.
Grow Together.
When you train with someone who sees the same data you do, excuses disappear. The Yakuru Ultra Ring gives both of you objective, real-time insight into recovery, sleep, and readiness.
88%
Of people say having an accountability partner dramatically improves their consistency and results.
67%
Of solo fitness journeys lose momentum within 90 days without external accountability.
What Training Partners Are Reporting
We surveyed hundreds of Yakuru Ultra Ring partners after 90 days of training together. Here is what they told us.
98%
Found the ring comfortable enough for both partners to wear 24/7 without interruption.
88%
Reported that training with a partner who tracks the same metrics kept them more consistent.
Sleep
7.4h
+1.37d
Recovery
63%
+57d
HRV
61ms
-17d
90%
Saw better results when both partners synced ring data with the Yakuru Complete protocol.
*Based on an early testing survey of verified Yakuru Ultra Ring customers with 90+ days of daily use.
See How
Training Partners Are Levelling Up Together
Real stories from couples, gym buddies, and training partners using Yakuru to hold each other accountable.
It started as a birthday gift for my brother. Now we have a group chat called “the scores”
It started as a random birthday gift for my brother.
Now we've got a group chat called "the scores" where we just send screenshots every morning. He gets so mad when I beat his sleep score. We go on runs together on the weekend too which is wild because
we literally never did that before. It's honestly just a really good excuse to hang out more and lowkey keep each other in check.
My wife and I are both runners. Two rings, zero arguments about who is too tired for the Sunday long run. The data settles it.
My girlfriend bought the partner deal and I thought it was gimmicky. Two weeks later I was checking my sleep score before she even woke up. Now we hold each other accountable on everything. Bedtime, hydration, rest days. It turned health into a shared project.
Best mate and I got the BOGO deal when we signed up for a marathon together. Neither of us had run more than 10k
before so we needed all the help we could get. We share our weekly stats and call each other out when recovery is low but someone still wants to go hard. There have been genuine arguments settled by just
pulling up the app and showing the numbers. We finished the marathon by the way. Already signed up for the next one.
Got a ring for me and my brother. We check each other's recovery before every gym session now. Simple as that.
My mom got us the two-ring deal when I moved away for uni. At first I thought it was her way of keeping tabs on me, but honestly it became our thing. She texts me her sleep score after a rough work week, I send mine after a late night out. We compare recovery every morning and it has turned into this daily ritual that keeps us connected. Best gift she has ever given me and I am not even exaggerating.
My sister lives in another city. We compare recovery scores daily. Feels like we are training together even 600km apart.
My wife and I both work long hours in demanding jobs. We were always too tired to do anything together on weekends. The rings showed us our recovery patterns were completely opposite, so we started planning around whoever needed rest more. Some Saturdays we hike, some we stay in. But now it is a conscious choice based on real data, not just collapsing on the couch by default. It has genuinely improved how we take care of each other.
Shared Progress with Yakuru Track
The Yakuru Ultra Ring lets you and your partner share key biometrics, compare recovery, and hold each other accountable through Yakuru Track.
See Every Metric That Matters
Track HRV, VO₂ max, recovery scores, sleep stages, and more, all in one place.
Turn Your Data Into Action
Get personalized insights and recommendations based on your real-time biometrics.
Personalize Your Protocol
Customize goals, alerts, and routines tailored to your unique physiology.
Prove Your Progress
Track trends over time and see measurable improvements in your health.
Frequently Asked Questions
The Yakuru Ultra Ring is a smart ring designed for 24/7 health tracking. It continuously monitors heart rate, heart rate variability (HRV), sleep quality, SpO₂, skin temperature, and more-giving you a complete picture of your body’s performance and recovery.
The Ultra Ring tracks heart rate patterns, sleep, and recovery to help you follow your trends over time. A good fit is important for reliable readings. Accuracy can vary with movement and how you wear the ring, so its data should not replace medical advice.
The Ultra Ring offers up to 7 days of battery life on a full charge. Battery life may vary depending on use and settings.
Yes. The Ultra Ring is rated for water resistance up to 100 metres and is suitable for swimming and showering. Follow the care instructions for limits on water use.
The Ultra Ring works with Yakuru Track. Connect your ring to the app to view your sleep, recovery, and activity data in one place.
The current sizing guide lists US sizes 7 to 14. Use the Ring Sizing Guide to find your fit before ordering.
Yes. The Ultra Ring works with both iOS and Android through Yakuru Track. Check the app’s device requirements before ordering to make sure your phone is compatible.
