Herz P1 Smart Ring
A companion app designed to make complex health data feel simple.
The Herz P1 Smart Ring collects continuous vitals data. The companion app needed to surface that data in a way that felt empowering, not overwhelming — for health-curious people, not just quantified-self enthusiasts. We designed the experience around hierarchy and restraint, built on a single component-and-token system so it stays coherent across dozens of screens and hands off cleanly to engineering.
The brand
The Herz P1 Smart Ring collects continuous vitals data, and the companion app is where that data becomes useful — or overwhelming. The hardware can capture far more than most people can interpret, so the app, not the sensor, decides whether the product feels empowering or intimidating.
The challenge was to make rich health information legible for everyday, health-curious people — not only quantified-self enthusiasts who enjoy dense dashboards. That audience wants reassurance and direction more than raw numbers, which sets a high bar for clarity: the interface has to translate continuous data into something a non-expert can act on at a glance.
The strategy
We led with hierarchy and restraint. Instead of surfacing every metric at once, the app foregrounds what matters now and lets people drill into detail on demand, so the experience reads as guidance rather than a data dump. Progressive disclosure does the heavy lifting — the surface stays calm, and depth is there for anyone who wants it without taxing everyone who doesn’t.
Underneath the screens is a single component-and-token system. Designing against shared primitives kept the interface coherent across dozens of screens, made data visualisation consistent wherever it appears, and turned handoff into something clean and predictable for engineering — every screen is assembled from the same documented parts rather than drawn one-off.
What we delivered
We designed and prototyped around 40 screens and built a complete design system — components and tokens — across three sprints from strategy to design to handoff. The team received a documented, buildable system rather than a set of disconnected mockups.
The outcome
The companion app makes continuous health data feel simple and empowering, backed by a design system the team can extend as the product grows. New features land inside the same component and token rules rather than being designed from scratch, so the interface stays coherent as it scales and engineering keeps a clean, buildable source of truth — the experience and the system that produces it both built to last beyond the first release, so the product can keep adding capability without the interface getting harder to use or harder to build.