The AI ring you talk to.

What an AI ring is

An AI ring connects you to an AI assistant from your finger. Most smart rings sold today track sleep and heart rate. A few newer ones record voice notes and pass them to an app on your phone. Lychnos Ring is made for conversation: you press and hold, you speak, and the answer comes back to the ring itself.

What makes Lychnos Ring different

• Its own eSIMOnce it is set up, the ring reaches Lychnos without your phone, wherever its mobile network reaches.
• A screen you see through72 by 40 pixels under clear resin, dark until you look. The first line of every answer, at a glance.
• A voice at your earA tiny speaker you hear with the ring raised to your ear, or earbuds with Bluetooth LE Audio.
• It asks firstSending a reply, moving a meeting or deleting anything waits for one press.
• Answers you feelTrue, false or not sure: each has its own buzz.
• Open firmwareThe ring’s firmware, the app and the protocol, under Apache-2.0.
• Tap to payPlanned: pay at shop terminals with a tap, through a payment partner. The ring holds a token, not your card number.

How it works

1. Hold to talk. The microphone gets power only while you hold the button: a switch in the hardware, not a setting.
2. Lychnos thinks. Your words travel over the ring’s eSIM to our cloud in the EU, where they become text. The voice clip is deleted right after.
3. One buzz, the answer. The first line appears on the screen; raise the ring to hear the rest.
4. One press: yes. Two presses stop Alkyon, the flying companion, at home.

What you can ask In development

• “What’s next today?” and a morning brief from your calendar, your mail, the weather and the traffic.
• “Tell me when Anna writes.” A buzz for the mail that matters; the rest waits.
• “Move my three o’clock to four.” Lychnos finds the slot and asks before it moves anything.
• “Watch my flight.” Or a price, or a news topic.
• “Is that true?” Repeat a claim you heard; Lychnos checks the claim, not the person, and buzzes the answer.

The numbers so far

Concept figures from our design files. We publish what we measure before we ask you for the rest of the price.

Health and sleep Second model

The first Lychnos Ring is built for conversation and keeps its whole battery for it. Health comes with the second model: sleep, heart rate, heart rate variability, skin temperature, stress, blood oxygen trends and blood pressure trends (set against a cuff once a month), as wellness insights rather than medical measurements, kept in our EU cloud with your explicit consent and shared with the assistant only if you allow it. Later, Lychnos can also read out the numbers from an approved glucose monitor you already wear. Why we chose this order.

Who it is for

People who want the useful part of their phone without the pull of its screen: in a meeting, on a walk, in the kitchen, at the desk. The ring does a few things all day and lets the phone stay in the bag. Read more about the phone-free assistant, or see how it compares with other AI rings.