Stream Smart Ring: Voice Notes & Music Control from Ex-Meta Team

Former Meta employees launch Sandbar's Stream, a smart ring for effortless voice capture and audio management.

A new smart ring called Stream, developed by ex-Meta employees, allows users to discreetly capture voice notes and control music. This device aims to integrate AI-powered assistance directly into daily life without phone distractions.

Sarah Kline

By Sarah Kline

November 6, 2025

4 min read

Stream Smart Ring: Voice Notes & Music Control from Ex-Meta Team

Key Facts

  • Former Meta employees Mina Fahmi and Kirak Hong launched Sandbar, introducing the Stream smart ring.
  • The Stream ring allows users to discreetly capture voice notes and control music.
  • The device features microphones and a touchpad, activating only when pressed and held.
  • The companion iOS app includes an AI chatbot for conversing and organizing notes.
  • The microphone is sensitive enough to pick up whispers and transcribe them.

Why You Care

Ever wish you could capture a brilliant idea instantly without fumbling for your phone? What if your next great thought could be recorded with just a subtle gesture? A new device called Stream promises to make this a reality for you, directly from your finger. This smart ring, launched by former Meta employees, is designed to seamlessly integrate voice notes and music control into your daily routine. It means less distraction and more focus on what matters to you.

What Actually Happened

Two former Meta employees, Mina Fahmi and Kirak Hong, have launched Sandbar, a company introducing the Stream smart ring, according to the announcement. This new wearable device focuses on voice-based interaction and discreet note-taking. Fahmi, Sandbar’s CEO, brings extensive experience in human-computer interface design. He previously worked at Bryan Johnson’s Kernel and Magic Leap. Kirak Hong, the CTO, was at Google before joining CTRL-Labs, where he met Fahmi. Meta later acquired CTRL-Labs in 2019, as mentioned in the release. Their work there contributed to neural interfaces for Meta’s smart wearables. The Stream ring aims to offer a conversational hardware interface, moving beyond traditional app barriers.

Why This Matters to You

Think of all the times an idea strikes while you’re on a walk or commuting. Pulling out your phone can break your flow. The Stream ring addresses this directly, allowing you to capture thoughts without interruption. Mina Fahmi explained, “A lot of my ideas bubble up when I’m walking or when I’m commuting, and I don’t want to pull out my phone to interrupt that moment.” This quote highlights the core problem the Stream ring solves for you. It also means you won’t need to shout into your earbuds, maintaining your privacy. The ring, worn on your dominant hand’s index finger, features microphones and a touchpad. By default, the microphone is off, activating only when you press and hold the touchpad. This ensures your privacy and prevents accidental recordings. The microphone is sensitive enough to pick up whispers, transcribing them into a companion iOS app. Other apps like Wispr Flow and Willow offer similar quiet capture capabilities. The Stream app also includes an AI chatbot that can converse with you. You can organize your notes and edit them yourself or let the AI assist. The app allows you to review your discussions over days or weeks with a simple pinch-to-zoom gesture. Imagine how much more productive your brainstorming sessions could become. How might discreet voice capture change your daily workflow?

Here are some key features of the Stream ring:

  • Discreet Voice Capture: Record thoughts without pulling out your phone.
  • AI Chatbot Integration: Converse with an AI assistant within the app.
  • Personalized Voice: The assistant’s voice sounds similar to yours.
  • Music Control: Manage your audio playback on the go.
  • Privacy-Focused: Microphone activates only with a deliberate gesture.

The Surprising Finding

What’s particularly interesting is how the Stream ring came about. Fahmi initially built a journaling app when large language models first emerged. However, he found that the app itself became a barrier to capturing his thoughts, as detailed in the blog post. This is a twist because you might expect a software approach to be the ultimate answer. Instead, his experience led him to explore a hardware interface. This challenges the common assumption that all productivity issues can be solved with more software. The team realized that the physical act of interacting with a phone could hinder spontaneous thought capture. This insight pushed them towards a more , physical approach. The focus shifted from a complex app to a simple, gesture-controlled device. This approach prioritizes , unobtrusive interaction over feature-rich software.

What Happens Next

The Stream smart ring is entering a growing market of voice-based hardware devices. These include card-shaped devices from Plaud and Friend, as well as wearables from Limitless and Bee, the company reports. Sandbar’s entry suggests a strong future for integrated, AI-powered wearables. For example, imagine using the Stream ring to quickly dictate a shopping list while you’re pushing a cart. Or perhaps you could control your podcast playback during your morning run. In crowded spaces, users can wear headphones to converse privately with the assistant, the team revealed. This offers a practical approach for privacy in public. Readers should consider how such discreet devices could streamline their daily tasks. The focus on a conversational hardware interface marks an interesting trend. Expect to see more devices like Stream emerge over the next 12-18 months. They will continue to blend AI assistance with minimal user interaction.

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