Resonance

Inspiration

We started with a feeling most people recognize but can't quite name: leaving a conversation feeling drained without knowing why, or sensing that something has shifted in a relationship before either person has said a word about it. We've all had that one coworker who seemingly wrecks your whole afternoon just by being in the room. You don't know why you feel "off," but your body does, tracking that invisible disconnection where you're both present, but neither of you is actually there. The science of physiological coupling has been studied in labs for decades. Heart rate variability mirrors between people who are genuinely present with each other. Skin conductance spikes happen in tandem. Peripheral temperature converges when people feel emotionally close. None of this was new. What was missing was an interface for it.

One unexpected reference point was The Sims. In The Sims, every interaction between characters surfaces as a small plus or minus above their heads, a simple, readable signal of whether a moment helped or hurt a relationship. That visual language stuck with us. It became the foundation for how Resonance surfaces interactions: each logged moment between paired users shows as a positive or negative event, mapped to the specific signal it affected. The logic of how interactions build or erode a connection score is directly borrowed from that model — grounded in decades-old game design that turns out to be surprisingly good interaction science. That's what we set out to build.

What It Does

Resonance is a smart ring and companion app that makes physiological synchrony legible — between you and yourself, and between you and the people you care about. It was built around one foundational idea: before you can understand your relationships, you need to understand yourself.

Solo Mode is where everyone starts. The ring spends its first weeks learning your true baseline — what your nervous system looks like when it's calm, resourced, and running on its own terms. Most people have never had access to this. They know when they feel off, but they don't know what "on" actually looks like in their body. Once Resonance knows your baseline, it can tell you something much more specific: how the people and environments around you move you away from it — or back toward it.

Four signals build this picture continuously:

Heart Rate Variability — your primary regulation signal. High HRV means calm and resourced. Low HRV means your nervous system is working harder than it looks.
Electrodermal Activity — not just spikes, but the slow drift of cumulative stress accumulating beneath conscious awareness across the day.
Peripheral Temperature — gradual finger cooling signals sympathetic activation before you've consciously registered that anything is wrong.
Post-Interaction Recovery — how long your nervous system takes to return to your personal baseline after a dysregulating interaction. Not just "this person stressed me" — but "I still haven't recovered two hours later."

That last metric is the one most people wish they'd had sooner.

Paired Mode builds on that foundation. Once Resonance knows what your nervous system looks like on its own, it can read what happens to it when you're with someone you care about — and what happens to the space between you. For romantic partners, it tracks HRV Synchrony, Thermal Convergence, Sympathetic Co-Arousal, and Repair Arc. For close friendships, it surfaces a distinct set of metrics built for that relationship type: Engagement Synchrony, Stress Contagion Index, Reciprocity Score, and Drift Velocity — the rate at which a friendship is quietly becoming something different.

The companion app is locked during active interactions by design. The body receives first. The mind reflects later. In the evening, your reflection window opens: a waveform of your day, one insight, and — after 30 days — your personal patterns. Pairing requires both people to be physically present, holding their rings together and confirming at the same time. Consent is built into the hardware, not a checkbox in settings.

How We Built It

Resonance was designed in under 4 days for FigBuild 2026. We knew the hardware needed to be a slim, skin-toned ring that was "boring on purpose" so it wouldn't pull focus from the actual human interaction. The full experience was built in Figma, with interactive prototypes in Figma Make. Our process moved through four phases:

Concept definition — grounding the idea in real research on cardiac coherence, physiological coupling, and co-regulation, and defining distinct metric sets for each relationship type
Information architecture — structuring the data hierarchy so raw biometrics never surface directly; users only ever see derived resonance scores
Interface design — building the visual system, waveform language, and the haptic vocabulary that communicates synchrony states without pulling users out of the moment
Interaction and copy — writing every insight card and metric explanation to be observational and non-prescriptive. Resonance surfaces information, it never tells you what to feel

Challenges We Ran Into

Time: FigBuild is a 72-hour design sprint, and Resonance is a complex system. We had to make fast, confident decisions about what to build deeply and what to leave for the roadmap. Collective Mode got scoped and set aside. Every hour spent on the consent model was an hour not spent on something else. We felt the clock the entire time.

Finding the idea: We didn't walk in with Resonance. We went through several concepts before landing here. And even once we had the core idea, it took a lot of time to figure out what made it genuinely novel rather than just another wellness tracker. The distinction between self-report and physiological signal was the unlock. Once we found that, everything else followed.

How interactions inform synchrony scores: This was the hardest technical and design problem we faced. It's one thing to say "the ring reads the space between two nervous systems." It's another to define exactly how a moment (a fight, a shared laugh, a period of comfortable silence) translates into a score that moves in a meaningful direction. The Sims gave us the visual model: surface each interaction as a positive or negative event, mapped to the specific signal it affected. But we still had to define the logic underneath — what makes a moment count, how it weights against the baseline, and how to communicate cause and effect clearly without oversimplifying what the body is actually doing.

Metric differentiation meant building genuinely distinct signal sets for romantic partners, close friends, and family rather than applying one framework to all relationship types. Each mode required its own research foundation and its own design language.

Accomplishments We're Proud Of

Designing a consent model where pairing is physically mutual by default. You genuinely cannot add someone without their active, embodied participation.
Building distinct metric sets for three relationship types, each grounded in research on physiological coupling.
Designing a product with no direct precedent — speculative enough to feel novel, grounded enough to feel necessary.
Shipping a functional Figma Make prototype with no prior experience in the tool in under four days.
The Drift Velocity metric for friendships — the insight that friendships fade without cultural rituals to catch the drift early felt like the most original thing we contributed.
Building an interaction model that translates complex physiological moments into readable positive/negative events — inspired by The Sims, grounded in the science of physiological coupling.

What We Learned

The most important design decision we made was the one that removes a feature. Being present is the whole point of Resonance, and the app had no business competing with that. Restraint is a design choice. We also learned that the hardest part of designing with sensitive data isn't the privacy architecture — it's the language. The difference between information and verdict lives entirely in how you write the copy. One careless phrase undoes the whole system. And we learned that friendship is genuinely underserved by existing relationship tools. Every wellness app we looked at was built around romantic partnerships or individual self-tracking. The drift that happens in close friendships (slow, invisible, mutual) had no interface. Building one felt necessary.

What's Next for Resonance

Collective Mode is the natural next tier — bringing Resonance into team environments, classrooms, and therapeutic contexts. The biometric framework is already defined. The UX patterns from Paired Mode translate directly. We made a deliberate call to ship Solo and Paired Mode well first, and Collective Mode is ready to build.

Beyond that: longitudinal pattern intelligence, so Resonance gets smarter about your specific nervous system over time. Haptic personalization, so users can tune the ring's vocabulary to their own sensitivity. And a facilitated reflection feature for pairs who want to bring their Resonance data into couples therapy or coaching — giving practitioners a tool they've never had before.

The signals were always there. We're just getting started on what you can do with them. Another next step is to expand the Resonance accessory line with other accessories that have the same impact, and add a light mode for users who prefer it.