Case study Mobile product foundation

Ech0.

Turning mobile screens into an installable app with clear integration boundaries.

Ech0 is a communication product in development. This case study covers its independently installable mobile UI preview.

My contribution: I moved its screens into an Expo app, kept navigation and local interactions working, and added validation for future integration.
Stack: Expo · React Native · TypeScript · React Navigation

My role

Migrated the static mobile pages into an Expo app and organized screen, state, navigation, and local data responsibilities.

An Expo app composes navigation and feature providers; local adapters satisfy screen data contracts until the runtime SDK is connected.

Packaged onboarding, chats, groups, calls, stories, settings, profiles, notifications, and galleries as a standalone Expo app
Added local demo adapters, in-memory chat state, and frontend architecture rules
Added lint, typecheck, tests, and platform export checks to CI

Kept screen layout separate from feature hooks and local data adapters
Preserved existing navigation routes, theme, assets, and local interactions
Added dependency-boundary checks and CI validation for web, iOS, and Android exports

Registration, messaging, calls, and invites in this preview are local simulations
Native permission and call behavior still require device testing after runtime integration

Preserve existing visual language · Keep navigation behavior · Local preview data · Future SDK integration

A merged, independently installable mobile UI preview with repeatable validation across three platform bundles.