Arca Ring in brushed titanium

The future of connection happens in real life.

A titanium ring and an agent that remember the people you meet.

The problem

You met them.
Then you lost them.

One great evening. Ten conversations. The details scatter across seven apps.

A day later it's fuzzy. A week later it's gone. Who was she? Where did you meet? What did you promise?

Every way to reach you,
in one tap.

Your ring carries your handles, your number and your email. Keep every app you use. Share them all at once.

What we believe

The most important context in your life doesn't come from a screen. It comes from people, meeting in real life.

01 Tap to connect

Tap to connect.

Touch your ring to the top of their iPhone.

Your card, instantly.

Their iPhone opens your card in an App Clip. Nothing to install.

Every way to reach you.

Your socials unpack one by one, ready to tap. Keep every app you use.

One tap to agree.

They continue with Apple, then Agree & Connect. Nothing is sent before that.

You're connected.

Both of you know who, when, where and how you met.

Two phones, one moment.

Their iPhone shows the App Clip. Yours shows Sora, just landed.

Their iPhone · App Clip

Your phone · Sora just landed

RingNFC link · LED
Their iPhoneApp Clip opens
Arca relayExchange. Deleted after pickup
Your phoneCard lands. Conversation starts

On Android, a web card does the same. Screens are from the real Arca Connect App Clip and app.

02 Press to remember

It knows who said what.

The tap already told Arca who you're with, and Arca knows your voice. So every line has a name on it.

Ring mic · concept Today your phone does the listening.

  • SoraAre you coming to demo day on the 14th?
  • YouWouldn't miss it. I'll send you the deck before.
  • SoraPerfect. I'll pass it to Daniel.
  • ArcaNoted. You promised Sora the deck before the 14th.
  1. Then you just talk. The ring listens.
  2. Afterwards, your Arca knows who Sora is
    and what you talked about.

03 Context that compounds

One tap becomes
a living map.

Every meeting adds people, places, topics and promises. The structure isn't designed up front. It grows from what actually happens.

Schema live

      For your agents Agent API · preview

      Your people,
      ready for your agent.

      The same map, served to Claude, ChatGPT or your own agent over MCP and a simple API. Before a meeting, your agent reads the brief.

      • arca.people.get(name)
      • arca.encounters.search(where, when)
      • arca.conversations.summary(person)
      • arca.promises.open()
      • arca.circles.list(event)
      • arca.context.for(person) the brief your agent reads before a meeting

      Planned. Live today: the exchange API behind the tap. Read the preview

      Claude · MCP
      // Before the 3pm coffee, your agent asks Arca
      await mcp.call("arca.context.for", { person: "Sora Lee" })
      
            

      Titanium.

      Light on your hand. Quiet on the table.
      An object for your inner circle.

      Inside

      Simple outside.
      Thoughtful inside.

      No buttons. A clean band with a light channel and an NFC antenna. The mic and haptics are concepts we're still working on.

      • Mic + hapticConcept
      • NFC antennaLive
      • LED light channelLive
      • Titanium shellLive

      The light

      A light that
      speaks softly.

      A thin orange line inside the band shows what Arca is doing.

      • BreathingIdle
      • FlashConnected
      • OrbitListening

      Finish

      Three finishes.

      Planned sizes (US)

      678910111213

      In the box Planned

      • Arca RingBrushed titanium
      • ◯◯◯Sizing kitFind your fit first
      • ▢Quick start cardTap it to set up

      Questions

      Does it work with Android?

      Yes. When the ring taps an Android phone, a web card opens in the browser and does the same exchange.

      What about battery?

      The tap uses NFC, which needs no battery in the ring. The concept mic would need charging; we'll share details when it's real.

      Who can see my data?

      Only you. The relay holds an exchange until your phone picks it up, then deletes it. Read the privacy policy.

      Do I need the app?

      You do, to set up your card and keep your people. The person you meet doesn't: their iPhone opens an App Clip.

      Remember everyone
      you meet.

      Arca Ring is coming. Join the waitlist and we'll write when it's ready.

      See a live card → Try the app →