Natura, an AI and hardware startup founded by Carlo Edoardo Ferraris — the man behind tech accessories company Rolling Square — has unveiled Interface, a $99 smart ring built around a simple idea: the best way to talk to AI agents is not a screen at all.
Instead of opening an app, the wearer presses a button on the ring, speaks a request, and releases. The ring routes the voice command through Natura's NatureOS software to a personal AI agent, which can carry out the task, capture a thought, or fire off an answer — all without the phone leaving the pocket.
A physical button for the agent era
The interaction is deliberately minimal: press, speak, release. Natura says the microphone is not always listening — it activates only when the user deliberately presses the control, answering one of the most persistent privacy complaints about ambient AI devices.
The ring is worn on the index finger with the button under the thumb, and it is built to be worn around the clock — even while showering or sleeping — so an agent is never more than a button-press away.
"Over time, we evolved to an understanding where you really want to have access to your agents 24/7," Ferraris told TechCrunch. "You don't want to have even one hour of your day where you cannot access them."
Interface is not Natura's first attempt at the problem. The company's earlier product, HumanPods, was a pair of AI-enabled earbuds aimed at the same kind of voice interaction with agents. Natura concluded earbuds were the wrong form factor for always-on access and moved to a ring instead.
One ring, every agent
At launch, Interface is expected to connect with a catalogue of agents and apps including Meta's Muse, Instinct, Grok Bot, Anthropic's Claude, and OpenAI's ChatGPT.
People who rely on more than one assistant can choose which one handles a given request — one for coding, another for booking a reservation — positioning the ring as a control point for a growing agent ecosystem rather than a standalone assistant.
Responses can be delivered through connected earbuds, an iPhone Live Activity, or Natura's companion app.
And while AI is at the heart of Interface, the ring also doubles as a health tracker, monitoring heart rate, heart rate variability, sleep, and activity — putting it in direct conversation with a crowded smart ring market.
Battery life is rated at six to twelve days depending on usage, with a full recharge taking about 100 minutes.
The $99 bet — and the subscription after
Pricing is deliberately aggressive: $99 for early adopters, with preorders expected to open next month and shipping targeted for December or January.
After an initial three-to-six-month free period, Natura plans to charge a $9 monthly subscription — a model that will test whether convenience alone can sustain a hardware-plus-service business.
"Every era of computing got its interface. The mouse, then the touchscreen," Ferraris said. "We built Interface so people can reach their agents without reaching for a screen."
Whether a ring becomes the primary hardware of the agent era is still an open question — but at $99, Natura is making one of the cheapest bets on the table.
