First: The Ultrahuman Situation
The $600 ring is called the Ring Air, made by Ultrahuman. I said I've been using it for nearly two years, which is true. But this is actually my third Ring Air.
The first one lasted just over a year before developing a bizarre charging bug: the app would say it was fully charged within seconds, then stop charging. Take it off and it died almost immediately. Ultrahuman only has a 12-month warranty, so no new replacement. They offered a refurbished one instead. That lasted about 4 months before its battery started dropping from 100% to zero in under 12 hours. That led to this current ring. And it was when ring two started dying that I decided to try the $30 option to see if I was even getting what I was paying for.
Full Comparison at a Glance
| Feature | $30 Luck Ring | $600 Ultrahuman Ring Air |
|---|---|---|
| Build quality | Scratching after 1 week | Near-pristine after months |
| Charger | Built-in battery, 90 min charge | No built-in battery, 2-hour charge |
| Battery life | 1-2 days real-world | Up to 7 days (chill mode) |
| Subscription | None required | None required |
| App design | Simple, customisable, tabbed | Elegant but cluttered, no home customisation |
| Sleep tracking | Duration and basic cycles only | Rate zones, skin temp, tosses/turns, full score |
| Activity types | Very limited, no gym/cardio | Comprehensive |
| Step accuracy | Excellent (199/200), real-time | Undercount (124/200), needs app restart |
| Workout without phone | Fails completely | Works independently |
| Price | $30 | $600 |
Build Quality
After two weeks wearing both rings every day, including gym sessions and beach visits, the $30 ring already has three noticeable areas where the black paint is scratching off. My year-and-a-half-old Ultrahuman ring, which has been through considerably more, still looks great apart from one small spot from grazing barbells at the gym.
Winner: $600 Ultrahuman Ring Air
The Charger
This one's a genuine surprise win for the cheaper ring. The Ultrahuman charger feels more premium: metal, with real heft to it. The $30 charger is pure plastic. But the $30 charger has a built-in battery, and the Ultrahuman one doesn't.
That is such an obvious feature that I honestly don't understand why Ultrahuman hasn't done it. Being able to top up the ring away from a wall plug is incredibly practical. Samsung and Oura offer versions of this. Ultrahuman doesn't. And to make it worse, the Ultrahuman ring takes a full 2 hours to charge from dead. For a battery this small, that's wild. The $30 ring is rated at 90 minutes and definitely charges noticeably faster.
Winner: $30 Luck Ring (built-in battery + faster charging)
Battery Life
The $30 ring claims 7 days. I never came close. First few days I was charging daily. By the end of the week, every 2 days at best. The Ultrahuman app has three modes: Turbo, Chill, and Critical Battery. In Chill mode, the Ultrahuman ring can actually get close to 7 days without sacrificing much tracking accuracy.
Winner: $600 Ultrahuman Ring Air
Apps
The $30 Luck Ring app is simple: a customisable card-based homepage, dedicated sleep and sports tabs, no subscription. The Ultrahuman app has a more elegant, liquid-glass-inspired design and tracks considerably more data. But the home screen is cluttered and there's no way to customise it. You have to scroll all the way down to find past workouts. Good news on both ends though: neither ring requires any sort of paid subscription to use its full functionality.
Ultrahuman wins on design and depth. Luck Ring wins on organisation.
Sleep Tracking
Over four nights wearing both simultaneously, they tracked sleep duration very similarly, within just minutes of each other. Hats off to the $30 ring for that. But that's where its strengths end. It's basically a glorified sleep stopwatch. The Ultrahuman ring tracks rate zones, counts tosses and turns, monitors skin temperature, and rolls everything into a proper sleep score. If understanding your sleep actually matters to you, it's not a close comparison.
Winner: $600 Ultrahuman Ring Air (significantly more depth)
Fitness and Step Tracking
Step Counting
In a controlled test of exactly 200 steps, the $30 ring recorded 199. Accurate, and it updated in real-time without me touching the app. The Ultrahuman ring recorded 124 for the same walk, and to see the updated count I had to quit the app, reopen it twice, and wait 30 seconds for a refresh. That's a surprisingly clean win for the budget ring.
Active Workout Tracking (The Big Problem)
The $30 ring has no weightlifting or generic cardio activity types. For gym workouts, it's basically useless. And for outdoor activities, here's the critical limitation: you must have your phone with you and must have granted the app background battery permissions. Without both of those, the workout either records nothing or stops midway through.
During a 10km run, the Ultrahuman app tracked the full distance accurately (10.16km vs Strava's 10.15km). The cheaper ring's app stopped at around 3km when it lost background permissions, then got confused after I re-granted them. The final result it reported:
The $30 ring said I ran 27.14km in 45 minutes at an average pace of 1 minute 40 seconds per kilometre. That works out to 35.9 km/h. The world record marathon pace is around 20 km/h.
Run Results (Second Attempt, With Background Permissions Fixed)
| Metric | Strava (control) | Ultrahuman | Luck Ring |
|---|---|---|---|
| Distance | 4.65 km | 4.64 km | 4.52 km |
| Time | 25:38 | 27:00 | 27:02 |
| Avg pace | 5:31/km | 5:39/km | 5:58/km |
| Calories | - | 492 | 307 |
| Avg heart rate | - | 163 bpm | - |
With permissions fixed, the cheaper ring completed a full run and returned reasonable results. Distance was slightly off, calories diverged significantly, but it got the job done. Just know that background permissions are not optional and the setup is entirely on you to figure out.
Winner: $600 Ultrahuman (accurate, independent). $30 ring usable only with phone + setup.
What Ultrahuman Still Needs to Fix
- A charger with a built-in battery for on-the-go top-ups
- Faster charging (2 hours from dead is too slow)
- Better long-term battery hardware reliability (3 rings in 2 years)
- Real-time step count updates without closing and reopening the app
- The ability to pair more than one ring to a single account
- Better data sharing with third-party apps like Strava
Who Should Buy Which?
Get the $30 Luck Ring if...
- You want basic sleep and step tracking cheaply
- You always carry your phone during workouts
- You want to try smart rings without committing big money
- You're happy to dig into app permissions settings
Get the $600 Ultrahuman Ring Air if...
- Detailed sleep analysis matters to you
- You want to track workouts without your phone
- You need comprehensive activity tracking types
- You can stomach the possibility of battery replacements
I'm going to keep wearing my Ultrahuman ring going forward, despite its issues. It's clearly the more capable device and their customer support has given me enough confidence that they'll sort replacements. But it really needs a better charger and the long-term battery problem has to be addressed. Three rings in two years is not a great track record for a $600 device.