Tech
Oura Ring 4 Ceramic review: a colorful glow up
Let’s be honest, most tech wearables are bulky and not exactly what you’d describe as pretty. But when you’re regularly wearing something on your hands, you probably want it to look nice and maybe even blend in with the rest of your jewelry. That’s the idea behind Oura’s newest smart ring, the Oura Ring 4 Ceramic.
The Ring 4 Ceramic is Oura’s first collection of smart rings that don’t feature metallic finishes. Instead, they’re made from zirconia ceramic, a more wear-resistant ceramic, which Oura says allows for both style and comfort.
I’ve tested the Oura Ring 4 Ceramic for the past three weeks, and here’s my experience with it.
However, before we get into the specifics, it’s worth noting that since the software behind the Oura Ring 4 Ceramic is the same as the Oura Ring 4, I won’t be getting too much into the software and hardware side of things. For that, you can check out our Oura Ring 4 review.
Finish and feel
The Oura Ring 4 comes in four colors: Midnight (dark blue), Cloud (white), Tide (light teal), and Petal (light pink). The ring costs $150 more than the starting price of the standard Ring 4, with a $500 price tag, and is available in sizes 4-15.
I opted for Midnight. Although that shade is technically dark blue, it can appear black from afar — or even a dark shade of green, I’ve been told. The ring doesn’t look like a tech wearable at first glance, which is nice if you want to prioritize aesthetics without sacrificing functionality.

When compared to the original Ring 4, the Ceramic version is a bit thicker, but it’s not super noticeable. The titanium version is 2.88 mm thick, while the ceramic version measures 3.51 mm.
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As for the weight, the ring can weigh between 5.1 to 8.1 grams, depending on the size you get, making it heavier than the Titanium Ring 4, which weighs between 3.3 and 5.2 grams.
Despite being thicker and heavier than its predecessor, I found the Oura Ring 4 Ceramic to be comfortable and lightweight, even when compared to a standard metal band. It feels like a pretty regular ring, just a bit thicker.
The ring is smooth and not as prone to collecting fingerprints as the titanium versions of the Ring 4. Since the zirconia ceramic is warmer and less slick than the titanium rings, the Ring 4 Ceramic can feel a bit “sticky” at times, meaning the outside of the ring might feel like it’s sticking or clinging to the sides of your fingers, but I did get used to the feel of the ring pretty quickly.
Oura says the color on the rings comes from natural minerals in the ceramic itself, so it stays vibrant and doesn’t fade over time. (Of course, I’ve only had the ring for three weeks, so I can’t speak to how it would hold up long term, but so far, the color is identical to what it was on day one.)
Durability
Oura says that Ring 4 Ceramic is prone to scuffs from softer metals, like those found in cookware or dumbbells. The company says these scuffs can be addressed with the Polishing Pad that comes with the ring. (The review unit I received from Oura did not include the Polishing Pad, however.)
While there were moments when I thought I could see scuffs on the ring, they ended up being smudges that I was surprisingly able to clean away with the edge of my shirt or sweater.
The company also recommends wearing the ring on your non-dominant hand to avoid unnecessary impact. However, the ring just felt right on my dominant index finger, so that’s where I wore it for the past three weeks. This exposed it to more potential damage in a briefer period of time than a typical customer might see.

The first day I put on the ring, I put it through a busy travel day to TechCrunch Disrupt, our annual conference in San Francisco. I wasn’t sure how well the ring would hold up with me hauling my luggage around, accidentally hitting the ring on a few counters (I’m clumsy!), or letting it brush against the airplane window when I leaned in for a nap.
As it turned out, the ring made it through all of that unscathed. There were even a handful of moments when I was certain I had scratched it — like when I was holding onto a rusty railing walking up the steps of the Point Arena Lighthouse, forgetting that I had the ring on, or when I forgot to remove it before doing the dishes. But the ring didn’t end up with any marks or permanent damage.
It’s worth mentioning that although the ring is water-resistant up to 100 meters, which means you can wear it while doing the dishes or showering, I personally took it off while doing the dishes because Oura warns that the ring can scuff when it comes into contact with softer metals.
Since I’ve had less than a month with the ring, I wouldn’t be surprised if, further down the line, the ring were to collect at least some scuffs or dents, especially given its location on my dominant hand.
Final thoughts
Beyond aesthetics, I found the ring quite useful in helping me understand my heart health, sleep, and stress through the Oura app. Each morning, I found myself looking forward to seeing my “readiness score,” which is calculated using both short-term and long-term metrics to show how prepared you are for the day ahead.
Plus, the battery life is holding up well, as I’ve only had to charge it once per week, which is on par with Oura’s promise of a battery that lasts between 5-8 days.
Choosing between a titanium and a ceramic ring ultimately depends on your aesthetic preferences and your ideal price point. With color and material being the only differences between the two, it really comes down to whether you want a sleek, modern finish or the standard metal smart ring look.
If you want that pop of color and style, then the Oura Ring 4 Ceramic might be the smart ring for you.
Tech
Waymo starts autonomous testing in Philadelphia
Waymo is adding another four cities to its growing list of robotaxi rollouts. The company announced Wednesday it has begun testing its autonomous vehicles (with a safety monitor) in Philadelphia, and that it will start manual driving to collect data in Baltimore, St. Louis, and Pittsburgh.
Waymo did not offer a timeline for when it plans to launch commercial services in those locations, nor do we know whether the Alphabet-owned company will partner with other companies to operate robotaxis in each one. That has been the move in cities like Atlanta and Austin, for example, where Waymo has partnered with Uber to advance its robotaxi rollout.
But the new locations join a list of over 20 cities where the company is either offering rides, prepping a commercial launch, or testing. Waymo is also now offering rides on freeways in Los Angeles, Phoenix, and the San Francisco Bay Area. The company plans to be doing one million rides per week by the end of 2026.
Waymo has done all this while claiming to be operating at a level five times safer than humans, according to data the company recently released.
But the expansion has not come without its issues. The National Highway Traffic Safety Administration is investigating how the company’s vehicles operate near school buses, after a Waymo was filmed driving around a stopped bus in Atlanta in September.
This week, Austin news outlet KXAN published a report showing Waymo’s vehicles have driven past school buses that were in the process of unloading or loading children multiple times — including after Waymo claims to have shipped software updates to address the problem.
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Tech
Spotify Wrapped 2025 adds its first multiplayer feature with ‘Wrapped Party’
Spotify Wrapped is back. After last year’s widely criticized flop that included an AI podcast as its highlight, the streamer’s highly anticipated annual review feature has returned to its roots. This year, Spotify is doubling down on what it knows works best: deep dives into your streaming data, creative experiences, messages from favorite artists, and other social features.
The company claims that Wrapped 2025 is its biggest, as it’s introducing nearly a dozen new features in addition to its old standbys, like top songs and artists. Plus, it’s offering more visibility into users’ data than in years past. For the first time, Spotify Wrapped is adding a live multiplayer feature to compare your listening data with friends.
Wrapped Party, Wrapped’s first live interactive experience, allows you to invite up to nine friends to compare listening stats.

Also new this year, your Top Songs Playlist will include the play counts for each of the top songs, so you can actually see how much time you spent with your favorite tracks.
Other standout features this year include an interactive Top Song Quiz, a Listening Age feature, and Wrapped Clubs, which match you to one of six unique listening styles.
The company believes these additions will not only bring back the personalized, engaging experience that users have long expected from Wrapped, but will take it a step further by making it more interactive than before.
In the Top Song Quiz, for instance, you can try to guess which top song soundtracked your year before seeing the results.
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The new interactive Wrapped Party feature isn’t just about comparing the personal streaming data you’ve already received to your friends’ data, as that’s something people already do on social media. Instead, the feature presents unique data stories for your group, like who’s the “most obsessed fan,” the “early bird,” the most “picky listener,” or even something as nice as the “dinner table explainer,” meaning the person who listens to the most news podcasts.

Spotify says these awards update dynamically every time you join a Wrapped Party, so no two sessions are ever the same — even if you run through them again with the same group of friends.
The new Wrapped Clubs, meanwhile, will group you into one of half a dozen listening styles, like the “Soft Hearts Club,” the “Club Serotonin,” the “Full Charge Crew,” the “Cosmic Stereo Club,” and others. You’ll also receive a role in the club based on your listening data. You might be a club leader if your listening choices strongly matches the club’s values, a scout if you’re always seeking out new releases, or an archivist if you listen to music from past eras.

Another feature, Listening Age, compares your 2025 music listening to others in your age group. To calculate your age, the feature considers the release years of the tracks you listen to most. From there, it identifies the five-year span of music that you engaged with more than other listeners your age.

As in prior years, you’ll see your top songs, top artists, top genres, and, for the first time, top albums. If you engaged with audiobooks and podcasts, you’ll see metrics for those as well. Artists, writers, and podcasters will have their own version of Wrapped as before. And top fans will again receive video messages from their favorite artists, podcasters, and, now, authors.
You’ll also receive a playlist of your top songs of the year, as before.

What you won’t find in this year’s Wrapped is any feature that advertises it was made with AI.
In a press briefing on Tuesday, Spotify’s Senior Director of Global Marketing, Matt Luhks, admitted the company received a “lot of feedback” about its 2024 AI-focused Wrapped experience, saying it was a “mix of positive and ‘more constructive feedback,’” despite the feature driving more engagement than prior years.
“We take all of that in. We use that as information, insights, [and] inspiration for how we approached Wrapped this year,” he said in a press event ahead of today’s launch.
“What our users tell us about Wrapped means a lot to us, so it was really informative in how we approached Wrapped this year. And what we tried to build was the most creative, most innovative, most engaging Wrapped ever,” he added, setting a high bar for the 2025 edition of the now 11-year-old annual year-in-review feature.
“We’re the original and, we believe, still the best,” Luhks said.

Still, AI was a part of the Wrapped experience. Though the company claims the overall experience was not made with AI, it does leverage a LLM (large language model) to add a storytelling layer to Wrapped’s facts and figures, and natural language summaries in other parts of its experience, looking back on your data.
Spotify’s attempt to fix Wrapped after a notable stumble comes as the streamer faces increased competition from Apple, Amazon, YouTube, and others, which have all launched their own annual review features, inspired by Wrapped.
“Everyone seems to have their own version of Wrapped. Now, there’s a lot of reviews and replays and rewinds out there, but we believe that Wrapped still sets the bar for these year-end recaps,” Luhks said.
Along with the consumer experience, Spotify shared its top artists, songs, albums, podcasts, and audiobooks for the year, with top winners that included, respectively, Bad Bunny (top song and album), Joe Rogan (“The Joe Rogan Experience” podcast), and Rebeca Yarros (author of “Fourth Wing”).
Tech
Nothing looks to its community to raise $5M, wants to be ‘IPO-ready’ in 3 years
Hardware maker Nothing is letting its user base buy its stock as part of a new community investment round of $5 million. The new round, which opens on December 10, will enable consumers to buy the company’s shares at its Series C valuation of $1.3 billion.
The company said it has so far raised $8 million in total from over 8,000 people across two previous community investment rounds. It held its first community funding event in 2021, aiming to raise $1.5 million.
“This isn’t about raising capital, it’s about giving our community/fans a chance to invest while we’re private and join us on the journey,” a spokesperson for Nothing told TechCrunch.
Community investors have a rotating seat on the company’s board, but it is unclear what else they get for investing in the company through such rounds.
Nothing raised $200 million in its Series C back in September from investors including Tiger Global, GV, Highland Europe, EQT, Latitude, I2BF and Tapestry. The company has raised $450 million to date.
The community round comes as Nothing makes changes to its corporate structure as it tries to increase its share of a smartphone market dominated by giants like Samsung and Apple. The company is spinning off its budget CMF brand, and plans to explore AI-centric devices while it keeps building smartphones and audio products. And Nothing claims it crossed $1 billion in cumulative revenue this year, up 150% from 2024.
The startup is working to be “IPO-ready” in three years, CEO Carl Pei told TechCrunch in an email. “The timing will depend on market conditions and what makes sense for the business at that point in time,” he said.
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“What’s important is that we’re already operating with that discipline now. We’re building the systems, the governance, the financial discipline that a public company needs. It forces us to think longer-term and make smarter decisions that prioritise sustainable growth,” Pei added.
It’s not clear if Nothing aims to raise another round before an IPO. When asked about its fundraising plans, a Nothing spokesperson said the company is not thinking about raising capital immediately, but it wouldn’t be averse to those conversations.
Those interested in investing in the community round can use platforms like Wefunder and Crowdcube to participate.
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