Find your friends in the crowd with unique flashing patterns

🚀 Try it now at signalup.app

Signal Up is a zero-friction web app that helps people find each other in crowded venues by generating unique, shareable flashing patterns on their phones. No app install required.

• Zero Friction: Click link → pattern displays immediately
• Custom Patterns: Choose colors, animations (pulse/strobe/wave/fade), and speeds
• Mobile-First: Designed for phones held up in crowds
• Accessibility: Colorblind-friendly options and seizure warnings
• Instant Sharing: Share pattern links via text/messaging

1. Create: Generate a unique flashing pattern with custom colors and animations
2. Share: Send the pattern link to friends via text/messaging
3. Display: Friends click link → pattern displays fullscreen immediately
4. Find: Hold phones up with matching patterns to locate each other in crowds

• Frontend: Next.js 14 (App Router) with TypeScript
• Database: Supabase (anonymous auth only)
• Styling: Tailwind CSS + shadcn/ui with "8-Bit Neon Signals" design system
• Package Manager: Bun
• Hosting: Vercel

• 📊 GitHub Project Board
• 📋 Development Issues
• 📖 MVP Specification

• Bun installed
• Supabase CLI installed

# Clone and install
git clone https://github.com/camwest/up.git
cd up
bun install

# Start local Supabase
bun run supabase:start

# Generate TypeScript types
bun run supabase:types

# Start development server
bun run dev

# Run database tests
bun run test:db

# Generate migration from schema changes
bun run supabase:diff -f migration_name

# Reset local database
bun run supabase:reset

• CLAUDE.md - Development notes and setup guide
• MVP Specification - Complete product specification
• Deployment Guide - Production deployment requirements

• 5 Color Families: NEON (magenta), TRON (cyan), ACID (lime), GOLD (amber), VOID (violet)
• 4 Animation Types: PULSE (smooth breathing), STROBE (fast flashing), WAVE (moving sweep), FADE (gentle pulse)
• 5 Speed Levels: From slow ambient to high-attention emergency
• Accessibility Options: Colorblind-friendly presets for protanopia, deuteranopia, and tritanopia
• Safety Features: Seizure warnings for strobe patterns

• Fully anonymous - no user accounts or personal data stored
• Client-side generation - patterns created entirely in browser
• No tracking - no analytics or user behavior monitoring
• Open source - full transparency in code and functionality

Signal Up is designed to deploy seamlessly on Vercel with Supabase:

1. Database: Supabase with anonymous authentication enabled
2. Frontend: Vercel with automatic deployments from GitHub
3. Pattern Generation: Fully client-side, no server dependencies

See docs/DEPLOYMENT.md for detailed deployment instructions.

Built for real-world use at concerts, festivals, and crowded events. 🎵