I built a web app that generates personalized maintenance schedules based on your vehicle's year, make, and model. It cross-references NHTSA recall databases automatically, tracks service history, monitors warranty status, and integrates with Smartcar's API for live odometer and diagnostic data from connected vehicles.

Stack: Next.js (TypeScript), Tailwind, Supabase (auth, Postgres, RLS for tenant isolation), Vercel, Stripe. The Smartcar OAuth integration handles the Connected Car piece — currently supports most 2015+ vehicles from major manufacturers. Solo developer, built under Sector Three LLC.

Free tier available, paid plans from $2.99/mo. Looking for feedback on the product and the approach — especially from anyone who's worked with vehicle data APIs or built consumer tools in this space.

Your Service Book (https://yourservicebook.com/) Your Service Book — Smart Vehicle Maintenance Tracking Track every oil change, tire rotation & service for your car. Smart reminders, 100+ maintenance items, VIN decode & full history.