GURA is an events platform I founded and built myself, from scratch. People browse events, create an account and get tickets in the app, and it installs as a PWA, so it behaves like a native app on a phone without an app store.
I ran one of my own events through it and sold more than 200 tickets in the app. The product is a Next.js front end, Supabase, and an Express API on Node.js, deployed on my own cPanel hosting at Yegara Host under its own domain.