I tested the Ultrahuman Ring Pro: It’s a biohacker’s dream that’s not for me


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pros and cons

Pros

  • Long battery life.
  • Charging case comes with the smart ring, free of charge.
  • Enough features to please the biohackers.
Cons

  • Chunkier and more expensive than the Oura Ring 5
  • Customers report shipping delays
  • Might be overkill for casual users.

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A few years ago, I couldn’t differentiate between the Oura Ring 3 and the Ultrahuman Ring Air. Both smart rings both held a similar position in the wearables market — industry newbies with a novel design and insights you couldn’t get from smartwatches. Oura was the fan favorite, but Ultrahuman offered up a unique value proposition in its subscription-free business model without a paywall. 

Also: Two popular smart ring makers just got caught copying Oura – here’s what happens next

Two years later, the latest generations of both smart rings are vastly different. While Oura has ballooned in market share, selling more than 5.5 million smart rings since last September. Ultrahuman has spent a year catching up to its competitor, creating a new smart ring Oura can’t claim infringed on its patents. 

The result? The Ultrahuman Ring Pro, a good smart ring in theory. But in practice, it doesn’t feel like the device Ultrahuman sought out to make. Alas, patent infringements tend to cause companies to change plans. 

Ultrahuman went big with the Ultrahuman Ring Pro. It’s got double the battery life of the Ultrahuman Ring Air, and it’s .25mm thicker than the now-unavailable-in-the-US Ultrahuman Ring Air. It weighs at least 0.9 grams and at most 2.4 grams more than the Ultrahuman Ring Air, and it’s $130 more expensive than the previous generation. 

The company has gone against industry trends to make a ring even thicker and less comfortable to wear than its previous generation. For comparison, the Oura Ring 5 is 2.28mm thick, whereas the Ultrahuman Ring Pro is 2.65mm thick; its additional girth not making for the most comfortable wear. Its sensors protrude from the ring, another outdated feature Oura and other competitors have worked to improve upon. 

This thickness wouldn’t have bothered me if the Oura Ring 5 didn’t exist, but as I wore both around my fingers, I became more aware of the Ultrahuman’s overbearing design and less interested in keeping it on. 

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Ultrahuman Ring Pro is on the left and Oura Ring 5 is on the right. It’s a sizable difference. 

Nina Raemont/ZDNET

What Ultrahuman lacks in design, it makes up for in an enduring battery life and a tasteful app. The smart ring can last up to 15 days on one charge, a significant battery improvement that reduces charging to twice monthly. 

To top that extended capacity off, the Ultrahuman Ring Pro comes with a classy charging case and up to 45 days of battery life. It’s a nice touch, especially when I’m on the run and don’t have a port to plug the case into — it’s got enough power to charge the smart ring, no cords required. 

Also: Oura Ring 5 vs. Oura Ring 4: I compared both smart rings for health tracking – you should buy this one

Ultrahuman’s ethos hasn’t changed, the company still positions itself as your technofuturistic friend who’s really into biohacking, peptides, cold plunges, and lifestyle optimization.

But the recent app update changed the interface for the better. Before this update, Ultrahuman’s app wasn’t just made for the ring, but its whole ecosystem of biohackable products to reach Brian Johnson-level actualization. Now, however, the app makes more room for the ring’s wellness insights, even with additional tabs for Longevity, the AI chatbot, and “Zones”, Ultrahuman’s social platform.

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The Ultrahuman Ring Pro (left) juts out and is far fatter than the Oura Ring 5. 

Nina Raemont/ZDNET

All of this is to say that Ultrahuman is still the brand to choose if you’re committed to optimization. So, as someone who prioritizes activity and follows a fairly consistent sleep schedule but leads an active social life, I am not Ultrahuman’s ideal customer. I want a friendly health companion that summarizes my sleep, activity, and stress but ultimately minds its own business. 

In an attempt to optimize every aspect of my sleeping and waking hours, Ultrahuman feels a little too nosy and suggestive for my liking. After I wake up and check my sleep scores, Ultrahuman inserts a countdown to my next circadian phase on my phone’s home screen, encouraging me to get as much sunlight as possible before advancing to the next stage, where caffeine intake is permissible. 

Also: I wore the Oura Ring 5 for a month, and two big upgrades make it so much better than the 4

One day, it told me my brain “cleared out enough waste” last night, so I’ve earned extra flexibility to drink more caffeine without it impacting my sleep. That’s probably good news, but I was going to drink at least two cold brews and a Diet Coke regardless. Out of all the smart rings I’ve tested, this one makes me feel the most like a lab rat with its odd objectives and extra caffeine flexibility rewards.  

To its credit, Ultrahuman does a great job of illustrating visuals that contextualize all the data the smart ring gathers on your sleep, activity, stress, and overall wellness. Even though I don’t want to learn all about every biometric on the app, customers who do will get lots out of its data visualizations. 

Before you consider buying one of the smart rings yourself, note that customers in the r/smartrings Reddit have complained of Ultrahuman’s lackluster customer service as they await the shipment of the Ultrahuman Ring Pro. Kickstarter backers were expecting the rings to ship in June, but now the expected arrival time is mid August. Additionally, customers who complain in the r/Ultrahuman subreddit have witnessed their complaints removed. 

ZDNET’s buying advice

So, is the Ultrahuman Ring Pro worth it? It’s more expensive than the Oura Ring 5 (even though Oura has that $72 annual subscription), and it’s far chunkier. You’ll get more battery life out of the Ultrahuman Ring Pro, but you’ll also get a less comfortable wear during that 12- to 15-day battery run. 

It comes down to these three questions: are you willing to pay for an additional subscription on top of the smart ring’s asking price? If no, buy the Ultrahuman Ring Pro. Do you want a small smart ring? If yes, go for Oura Ring 5. Do you want more ways to optimize your lifestyle and dig into every aspect of your health data? If yes, go for the Ultrahuman Ring Pro.

Personally, I would choose the Oura Ring 5 over the Ultrahuman Ring Pro, as it was too chunky for my liking, and I found the health tracking to be too intrusive. 





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TL;DR

India debates sovereign AI after the US forced Anthropic to kill Fable 5, with proposals for a $5B fund and calls to embrace open-source models.

When the US government ordered Anthropic to shut down Fable 5 and Mythos 5 on 12 June, the export control directive was aimed at restricting foreign nationals from accessing America’s most capable AI. In India, Anthropic’s second-largest market, it landed as a warning shot about what happens when your AI infrastructure runs on someone else’s politics.

The suspension cut off Indian developers and enterprises from Claude’s most advanced models overnight. India’s Claude run-rate revenue had doubled since October 2025, and Tata Consultancy Services had announced a partnership just one day earlier, on 11 June, to train 50,000 employees on Claude and build a dedicated Anthropic business unit. That deal is now in limbo.

The timing has turned what was already a simmering debate about AI sovereignty into a full strategic reckoning. Proposals that sounded ambitious a week ago now sound urgent.

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Mohandas Pai, former Infosys CFO and one of India’s most prominent tech investors, has called for a ₹50,000 crore (roughly $5 billion) annual sovereign AI fund. He has also proposed a ₹2 lakh crore (approximately $21 billion) credit guarantee to finance cloud infrastructure, hardware procurement, and semiconductor development. The figures dwarf the government’s existing commitment.

India approved its IndiaAI Mission in March 2024 with a budget of ₹10,372 crore, approximately $1.25 billion. The programme has deployed around 38,000 GPUs so far. Pai’s proposal would quadruple annual spending and add a credit backstop an order of magnitude larger.

Sridhar Vembu, the founder of Zoho, has gone further. He argued that India should embrace smaller and open-source models, including Chinese ones, rather than depend on American frontier systems that can be switched off by executive order. “Technology is the ultimate weapon,” Vembu said. “Globalization is dead and Bharat must find her own way ahead.

The argument has teeth because the suspension demonstrated exactly the vulnerability Vembu is describing. Amazon’s CEO reportedly triggered the government crackdown by telling Treasury Secretary Scott Bessent that researchers had used Fable 5 to obtain information that could be used in cyberattacks. Anthropic called the action disproportionate, but compliance was immediate and global.

Policy expert Prasanto Roy put it bluntly: “American AI models are bound to American geopolitics.” For Indian enterprises that had built workflows around Claude, the lesson was that access to frontier AI is a privilege that can be revoked without notice, without consultation, and without regard for the commercial relationships it disrupts.

The Indian startup ecosystem is already adapting. Sarvam, a Bengaluru-based AI company, released 30-billion and 105-billion parameter open-source models at the India AI Impact Summit in 2026. Krutrim, founded by Ola’s Bhavish Aggarwal, has pivoted from building foundational models to providing cloud and AI infrastructure services, reporting ₹3 billion in revenue for fiscal year 2026.

Neither company is close to matching the capabilities of Fable 5 or Mythos 5. But the argument for sovereign AI was never about matching frontier performance immediately. It is about ensuring that the floor does not fall out when Washington makes a unilateral decision about who gets to use which models.

Aakrit Vaish, founder of the AI startup Activate, said the suspension “completely changes things” for the sovereign AI debate. Vijay Rayapati, CEO of Atomicwork, raised concerns about what the precedent means for Indian companies with multi-country teams that depend on American AI providers. If the US can shut off model access to enforce export controls, any country that relies on American AI is one policy decision away from disruption.

Not everyone agrees that India needs to build its own frontier models. Hemant Mohapatra, a partner at Lightspeed Venture Partners, argued that talent and compute access matter more than capital for building competitive AI. India has the engineering workforce, but the compute gap is significant, and closing it requires either massive domestic investment or continued access to foreign cloud infrastructure.

Anthropic opened a Bengaluru office as part of its India expansion, and the TCS partnership was designed to be a cornerstone of its enterprise strategy in the country. Whether those plans survive the suspension intact depends on how quickly Anthropic can restore access and whether Indian enterprises still trust a provider whose most capable models can vanish overnight.

The broader pattern is unmistakable. The US has spent four years tightening controls on AI technology, from chip export restrictions to model-level interventions. Each escalation pushes more countries toward the conclusion that dependence on American AI infrastructure carries political risk. India, with its 1.4 billion people and rapidly growing technology sector, is now asking whether it can afford that risk, and what it would cost to eliminate it.

The Opendoor layoffs in June 2026, which shut the company’s India office and affected roughly 250 employees, added another dimension. CEO Kaz Nejatian cited AI-native teams as the reason, suggesting that some US companies are using AI to reduce their reliance on Indian engineering talent at the same time that India is debating its reliance on American AI. The relationship is becoming less complementary and more competitive.

For now, the sovereign AI proposals remain proposals. Pai’s fund has no legislative vehicle, Vembu’s call for open-source adoption has no coordinated policy framework, and the IndiaAI Mission’s GPU deployment is still in early stages.

But the Anthropic suspension has done something that years of policy papers and conference speeches could not: it has given the sovereign AI movement a concrete, recent, and viscerally felt example of why dependence on foreign AI is a strategic liability. The debate is no longer theoretical.



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