FITT16 is a personality framework built on serious thinking. It lived as a static, long-form PDF report — the content was right, but it was trapped. People took the assessment, read the report once, and never came back.

Structured, personalized coaching has always been powerful, and always been expensive: it needed a human expert for every individual, which capped who could reach it. FITT16's technology changes that economics. My job was to design the interface that delivers it — not a prettier assessment, but a product people would return to, and a platform a coach could run across a whole roster.

The first decision was the smallest and the most consequential: what is one "use" of this product? A feed asks you to keep scrolling. A dashboard asks you to scan and triage. Neither fits something you open between meetings to think for ninety seconds.

So the dense PDF became a navigable, multi-page experience — profile, archetype, personal, professional, and career views the reader moves through, not past. On mobile it's six full-screen cards, one thought at a time. The first card earns the next open: a single, specific observation, and three honest ways forward.

Trade-off: one-thing-at-a-time means lower information density. Resolved with a quiet progress rail, so depth stays visible without rewarding the scroll-anxiety the format was built to avoid.

This is where the product goes furthest. An AI companion, tuned to each person's archetype, turns a static profile into an ongoing conversation — the depth of a coaching session, available any time, at a fraction of the cost. It's the piece that makes personalized coaching actually scalable.

The design problem was making it feel like a coach who knows you, not a chatbot. It opens already tuned to your profile, never from a blank box. It remembers what you raised last week and brings it back when it's relevant — not on a schedule. It offers three distinct voices to think with — the Mirror, the Thinking Partner, and the Guide — because the same person needs reflection some days and challenge on others. On the days that need nothing, the last card is a quiet close. No streaks, no badges, no chase.

How AI shaped the build: the voice system was developed by generating and pressure-testing hundreds of tone variants against real archetype profiles, then refining by hand — iterated the way you'd iterate a design system. It's how a three-voice companion shipped on a timeline that would normally allow one.

A coaching product has two people in it: the individual reflecting, and the coach guiding many of them. They need different things from the same data — the individual needs depth and one clear next step; the coach needs pattern, comparison, and the ability to act across a roster.

Rather than build two products, I built one design language with two compositions. The coach platform — access-code commerce, cohort management, organisation and archetype filtering — is a re-composition of the same parts, not a separate system. One coach, many people, structured access: the mechanism that turns expensive one-to-one coaching into something that scales.

Trade-off: serving two audiences doubles the surface area. A shared component system kept it maintainable and kept both views feeling like one product — built to extend as FITT16 grows.

The two surfaces aren't one layout at different widths — they do different jobs. Desktop is where someone goes deep. Mobile is built for the daily return: one insight, one prompt, one reason to come back. Same system, two rhythms of use.

This case study is being written in the same structure as the Dashboard: the problem, the decisions, the trade-offs, and the outcome. Check back shortly.

This case study is being written in the same structure as the Dashboard. Check back shortly.