Pace Your Energy, Avoid the Crash
Coralsoft designed, built and shipped this product for the client.
Visible helps people with ME/CFS, Long COVID and POTS pace their days — not a fitness app. A morning HRV reading, taken with the phone camera or the optional Visible Band 2.0 (by Polar), sets the tone; live data flags overexertion and trends reveal what triggers a crash. It is membership-based, with the band sold separately, and runs a research partnership with Imperial College London.
Visible helps people with ME/CFS, Long COVID and POTS pace their days — not a fitness app. A morning HRV reading, taken with the phone camera or the optional Visible Band 2.0 (by Polar), sets the tone; live data flags overexertion and trends reveal what triggers a crash. It is membership-based, with the band sold separately, and runs a research partnership with Imperial College London.
Visible helps people with ME/CFS, Long COVID and POTS pace their days — not a fitness app. The main delivery challenge was to give users sensitive health information presented calmly, clearly, and without adding cognitive load, while keeping Check in, Measure, and Pace consistent across the complete journey. We framed the engagement around the smallest production-worthy flow first, then expanded the scope without weakening the underlying component and data model.
We started with the navigation model, reusable screen primitives, and the data contracts behind the most important user journey. From there we delivered Check in, Measure, and Pace in vertical slices, so every milestone included a usable interface, live data, validation, and error handling. Realtime updates and offline recovery were designed together because mobile connectivity could not be assumed. The application foundation centred on React Native, Expo SDK 54, Expo Router, and TypeScript, followed by device testing and release hardening for iOS and Android.
The delivered scope brought Check in, Measure, Pace, and Alert into one coherent cross-platform mobile release. Live updates, recovery states, and operational feedback are part of the core flow rather than late-stage patches. For Visible, the practical result is a product that communicates its value quickly while giving the team a maintainable base for continued delivery in health & wellness.
The goal isn’t to do more — it’s to stay inside the envelope, so good days don’t borrow against the next week.
By turning heart-rate and symptom signals into live pacing guidance, Visible helped people stay inside their energy envelope — trading the boom-and-bust cycle for steadier days.
Discovery with ME/CFS & long-COVID patients; mapping the morning pacing moment.
Symptom check-in, heart-rate reading, wearable pacing alerts, trend charts.
Activity overlays, longer-window trends, shareable reports, research community.
Every case study covers a product Coralsoft designed, built, and shipped for a client.
