I'm a solo dev and I built InfraSim, a system design game for iOS and Android. You drag load balancers, caches, databases and queues onto a canvas, deploy it, and watch simulated traffic hit it. Then something fails and you have to figure out why. It launched a few weeks ago. A short video of a connection pool taking down everything behind it did better than anything else I tried, and today someone paid for Pro eight minutes after installing. Small number, big day for me. The first 15 levels are free, no account needed. Happy to answer anything about the build (Expo, React Native, Skia for the canvas, deterministic sim engine). iOS: https://apps.apple.com/app/id6809240894 Android: https://play.google.com/store/apps/details?id=com.infrasim.app   submitted by   /u/Individual_Main7377 [link]   [comments]