Natura's $99 ring is a remote control for other companies' agents. Its own spec sheet is still 'in validation.'

Carlo Edoardo Ferraris founded Natura, and he gave TechCrunch that line on 8 October, the day his company opened a waitlist for a ring called Interface 1. The device is a stainless-steel band with one button. Press it, speak, release, and a request goes out to an AI agent.

The hardware is specified, priced and photographed. Much of what would make the ring a finished product is marked, by Natura itself, as unfinished.

Press and hold the button, speak, then release. The microphone sits in the band, and a white light shows when it is live 2. Two clicks begin a longer recording and two more end it, which is how the ring handles a meeting 2. Natura's page answers the first question anyone asks about a microphone they wear. "No. Recording starts only when you use the button." 2

The work happens off the ring. NatureOS, Natura's app for iPhone and Mac, passes it to an agent you have connected, and that agent does the work 4. The answer returns through headphones you already own, as a Live Activity on the iPhone lock screen, or inside the app 4.

The band is stainless steel, 7.35 mm wide, in US sizes 7 to 13, and it charges in a case Natura expects to hold ten full ring recharges 2. Daily use runs 6 to 12 days per charge, and continuous recording runs 13 hours 2. That second number carries a footnote. Natura describes it as recording only, excluding audio transfer, and says it "is calculated from measured power draw, not a full battery-life test" 2.

Natura builds the ring. Other companies build the intelligence. The homepage handles the obvious question directly. Asked whether a buyer needs a specific agent, the page answers "No. You can connect agents such as Codex, Claude Code, Hermes, OpenClaw and tinyNature. Each keeps its own capabilities and memory; you choose what it can access." 3

The store inside NatureOS shows "1–12 of 145 agents" and lists Meta's Muse, Grok Bot, Instinct, Hermes, Claude Code, Codex, Poke, Orchid, Martin, Sidekicks, Duckbill and Allora beside Natura's own tinyNature 4. GamesBeat, writing from the launch interview, put the count at more than 140 5.

So what Natura sells is a trigger, a permission screen and a router. Its own diagram of the product says as much in four steps: Interface starts the request, NatureOS shows access, agents do the work, and the result comes back.

Give the company credit for the choice. Every other assistant in this category wants to become your only assistant, and a hub that keeps the agents you already pay for is a friendlier shape than a fourth one that wants to replace them. The limit is that a hub's value is borrowed. Each connection is another company's product, another company's terms and another company's uptime, and Natura's ring gets better or worse with products Natura does not control.

Most panels in the specs section carry a qualifier, and the qualifiers are the most useful copy on the site.

Under "Closer to you", the panel that covers heart rate, resting heart rate, heart-rate variability, sleep stages, step count and skin temperature, the line above the readings reads: "Health features are in validation. Final capabilities will be confirmed before release." 2

Under "Your voice", the entries for quiet speech and for noisy surroundings both end in validation 2. Under "Made to fit", the page promises a sealed design and then adds that "the final water-resistance rating will be confirmed before release" 2. The FAQ notes that the details of what works without a connection "will be confirmed before pre-orders" 2.

The health readings are the ones with a market to be measured against. Oura filed to go public on 3 September, with revenue that nearly doubled to $1.21 billion for the nine months to 30 June, 3.6 million rings sold in the past year and about 5 million paid members 7. Ultrahuman raised $70 million with Qualcomm's venture arm on board. Circular's next ring carries FDA-cleared ECG for atrial fibrillation detection. RingConn's Gen 3 starts at $349 and Samsung's Galaxy Ring at $399 7.

Natura's page asks a buyer to put $99 behind six sensor readings that the same page calls unconfirmed, in a category where the rival feature list is already written and priced.

The $99 is the early-adopter number, and the launch coverage says plainly that it will not hold. TechCrunch reports that Natura "plans to eventually raise the price", because it wants the device in people's hands before it charges what it needs, and that a $9 monthly subscription arrives after an initial three to six months of free service 1.

The gap between $99 and the real cost is being paid by the company for now. GamesBeat reported that the ring "costs about as much to make as an Oura ring, which retails at about $350", and that Natura is covering the difference to get early adopters 5.

Natura's own FAQ keeps every number open. "Join the waitlist for first access. Final price, preorder timing and delivery window are shown before checkout." 2

The dates disagree by a month across two launch-day interviews. TechCrunch says preorders "are expected to open next month, with shipping slated for December or January" 1. GamesBeat reported that Interface "will be shipping in January, 2027", and that Natura will show the device live in San Francisco on 9 November 5.

The company behind it is small. GamesBeat put Natura at about seven employees, started roughly two years ago, financed by angel money and capital from Rolling Square, the accessories business its founder ran before this 5. Interface is the second attempt: Natura built open-ear earbuds called HumanPods first, and moved to a ring 5.

Natura's privacy policy runs to twelve sections and was last updated on 24 September 2026 6. It is the most informative page the company publishes.

Real-time voice audio goes to ElevenLabs for speech-to-text, response generation and text-to-speech, and the policy says that stream runs under a zero-retention configuration 6. Conversation history and voice notes are stored on Natura's backend "for the lifetime of your account", unless you delete them or request deletion 6.

Health data and location are opt-in and off by default 6. Switch health on and NatureOS reads heart rate, heart-rate variability, sleep stages, steps, distance, active calories and VO2 max from Apple HealthKit or Android Health Connect. Switch location on and the app reads your position in the background in updates of about 500 metres, storing only the most recent one 6.

Then comes the line about the models. The policy says AI model providers "receive your conversation content, together with the context the Agent uses to respond (such as your location, and your health data when the Agent retrieves it)", and that "we do not name the specific providers for security reasons" 6. The AI disclosure repeats it: "We do not disclose the specific models or providers used for competitive and security reasons." 8

On the ring's own page you choose your agent by name. Behind the app, the models that answer are unnamed.

Everyone else is listed. The sub-processors are ElevenLabs, Composio for sign-in, Expo for push notifications, Twilio for the voice connection, Cloudflare for hosting and voice-note storage, Supabase for the database, and Google when you connect Gmail or Calendar 6.

Two sentences in the legal pages deserve their own mention. The privacy policy states that it "is not a contract and does not create any legal rights or obligations not otherwise provided by law" 6. The terms of service let Natura suspend or terminate an account "with or without prior notice ... without liability and for any or no reason", and they carry a mandatory arbitration clause with a jury-trial and class-action waiver 9.

Interface is aimed at two crowded shelves at once, and each has a recent cautionary story.

The first is smart rings. Oura filed to go public in September, Ultrahuman raised $70 million, and Circular, RingConn, Samsung and Dreame all sell or plan to sell a band with sensors in it. TechCrunch's reading of the field is that the race has moved past health and into a contest over "who can cram the most smartphone-like features into a two-gram titanium band" 7.

The second is AI hardware. Tony Fadell, who built the iPod and Nest, stood on a stage at MIT Future Fest this month and projected three discontinued devices: the Rabbit R1, the Humane Ai Pin and the Limitless pendant. "These were kind of the 'Gen 1' AI products, and because of my background, these companies called me and asked me to help them," he said. "I didn't." 10

His diagnosis was about need. "In each of these cases, each one of them didn't meet any kind of need," he said. "It was just interesting technology for geeks." 10 And on the assistant promise that all of these devices trade on, he added that few buyers have a reference for it: "It's less than 0.01% of the world population that has ever had a human assistant do anything." 10

One device appears on both lists. The Limitless pendant is one of Fadell's three examples of a first wave that failed, and GamesBeat lists it among Interface's rivals at launch 5.

Interface is a $99 trigger for agents that already exist, and the parts of it that ship this winter are real: a stainless-steel band, a button, a microphone, an iPhone and Mac app, and a permission screen that shows what each agent can reach. If you spend your day inside Claude Code, Codex or Hermes, a button you can press without taking out a phone is a reasonable thing to want, and the interoperability means the ring outlives whichever agent you abandon next.

Buy it as a health tracker and the arithmetic changes. Oura, RingConn, Circular and Samsung sell rings whose sensors, water resistance and feature lists are settled, and Natura's own spec page says its health features are not. Buy it as the interface of the agentic era and you are buying the button, because the era itself is being built by the companies on the other side of the router.

The price is the tell. A company that will not publish the final price, the delivery window or the water-resistance rating is asking you to back a product on the strength of a photograph and a waitlist.

One condition. Before any deposit leaves your card, get three numbers in writing: the price including the subscription, the water-resistance rating, and the list of health readings that made it through validation. All three exist on Natura's own pages today, and all three currently read "to be confirmed".