
Project Sub Three: The Coach I Couldn't Build for 20 Years
A weekend passion project decades in the making — an AI training companion for runners chasing the sub-three marathon, and a test of how far one product person can take an AI-native build.
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I write about building lovable products, guiding teams through ambiguity, and designing with humanity in mind.

A weekend passion project decades in the making — an AI training companion for runners chasing the sub-three marathon, and a test of how far one product person can take an AI-native build.

Asked to keep stats for my son's JV basketball team, I went from a clipboard and pen to a one-handed tracker app and a game report coaches open minutes after the final buzzer.

A looks-like prototype built in a day with Lovable: can a conversation replace the one-size-fits-all onboarding wizard? Testing with real people said yes — and exposed the hole I'd missed.

Near-infrared sensors are shrinking out of the factory and toward consumer devices. Before the tech was even ready, two quick prototypes went hunting for the use case — and only one came back alive.

A firmware engineer needed a spec for a single button and a single multicolor LED. Instead of writing a document, we built a simulator — and tested the hardware before the hardware existed.

Pilots couldn't wear the hydration pack, so drink reminders had to reach them through their aviation headsets — without stepping on the sounds that keep a helicopter in the air. A utilitarian prototype tuned the tones.

Just after Google Glass launched, Adidas and Google went hunting for use cases. The first miCoach-on-Glass prototype wasn't an app — it was a slideshow of static screens, worn on runs and rides.

Why we overeat at meals — and where a product could step in to help. An interactive look at the gap between eating enough and actually feeling it.

A field map of every wearable that matters in 2026 — who's playing where, how we got here, and what makes someone wear it again the next day.

What happens when an empowered product team adopts AI. Same team. Bigger reach. Richer overlap.

A weekend prototyping walkthrough — how I built a working product concept (landing page, live prototype, and all) using ChatGPT, Cursor, Claude, and Lovable.

A metaphor from a year of learning drums and fifteen years of watching technology reshape work. Better tools don't shrink human potential. Sometimes they give it a backbeat.

The features are table stakes. The experience is the product. On retention loops, emotional design, and why connected hardware + AI is the perfect canvas.

AI agents are coming for the functional layer of software. The products that survive will be the ones that built something agents can't replicate.

20 years of building products people actually use — from the world's first intelligent running shoe to one of the most-used fitness apps on the planet.
How working with AI to build a real product changed the way I think about requirements, pivots, and what it means to lead at the edge.

How treating strategy like a product unlocks better outcomes for teams and users alike.

Inside the product thinking behind a next-generation connected hydration system for endurance athletes.

What I learned building one of the world's most-used fitness apps — and how we kept millions of users coming back.

Designing a subscription fitness experience that bridged content, community, and hardware at global scale.

From patent to product — how we shipped connected sports hardware before IoT was a mainstream category.
More articles coming soon