Vyralyx — AI-Powered Fitness

Overview

Vyralyx is an AI-powered fitness companion that generates personalised workout plans based on goals, experience level, and available equipment — then adapts those plans based on logged performance over time. Built entirely in React Native for cross-platform iOS and Android delivery.

Key Features

• AI-generated workout plans personalised to goals and fitness level
• Exercise library with step-by-step instructions and sets/reps tracking
• Progress tracking with charts showing strength and volume trends over time
• Real-time coaching feedback during workouts
• Supabase-powered sync — workouts persist across device reinstalls

Technical Stack

Architecture Decisions

Expo Router

File-based routing in React Native brings the same DX as Next.js App Router to mobile — no manual navigator configuration, deep links work out of the box, and tab/stack navigation is expressed as a directory structure.

Adaptive Plans

Workout plans are stored as JSON structures in Supabase. A lightweight recommendation layer compares the user's logged RPE (rate of perceived exertion) against targets and adjusts the next session's load accordingly — no full AI call required for each adaptation.

Lessons Learned

NativeWind's responsive utilities don't translate 1:1 from the web — breakpoints are meaningless on a 390px wide phone. Design for mobile-first with explicit platform checks (Platform.OS) for layout edge cases.