DESIGNING
TRUST
IN HEALTH.
We defined and designed the MVP of PREOS — a mobile app for people to save, organize, and share their medical studies, with clarity and privacy as a foundation.
VIEW CASE ↓
01 — THE CONTEXT
A DAILY
AND SENSITIVE
NEED.
Many people have their medical studies scattered across phone photos, emailed PDFs, physical papers, and portals from different institutions. When they have an appointment, the information is nowhere to be found.
PREOS was born to solve this: an app to save, organize, and share medical documents. And like any app that asks for sensitive data, it had to be designed starting from trust, not just functionality.
02 — THE CHALLENGE
WHAT THE MVP
HAD TO
RESOLVE.
Scattered documentation
Studies in photos, PDFs, emails, and papers. When it is time for an appointment, finding the right document becomes the first friction point.
Sensitive data requiring trust
The app asks for ID, health details, contact info. If the experience doesn't explain clearly what it does with this information, the user drops off before starting.
Non-technical users
The product had to work for anyone: no jargon, no unnecessary steps, no screens that intimidate or confuse.
03 — THE PROCESS
HOW WE
DESIGNED IT.
DECISION 01 · SCOPE
An MVP that resolves the essentials.
We defined what went into the first version and what was deferred for later. The product was organized around four main actions: creating an account, completing the profile, uploading studies, and viewing or sharing. OCR, backoffice, and other advanced layers remained on the roadmap.
DECISION 02 · TRUST
Privacy as an experience, not as fine print.
Instead of hiding terms behind a checkbox, we integrated them as part of the journey. Dedicated screens explain what data is requested, what it is used for, and what users can do with their information — in plain language, not legal jargon.
DECISION 03 · CLARITY
Microcopy that reassures, rather than technicalizes.
Every message in the product — errors, permissions, empty states, confirmations — was written to support the user. No technical terms, no scare tactics, no over-explaining. Short copy that says what is needed and hands back control.
04 — THE SOLUTION
A SIMPLE, USEFUL
AND TRUSTWORTHY MVP.
The MVP was defined as a simple, useful app ready to scale — with OCR, backoffice, and other layers on the roadmap, but kept out of the initial user's way.
05 — THE IMPACT
FROM IDEA
TO PRODUCT.
* Case study in development · Planned launch 2026
06 — LEARNINGS
In healthcare products,
trust is not promised:
it is designed.
— PR. DIGITAL STUDIO