Most "side project ideas" lists end at todo apps and weather apps. Here are six that actually have users — with the real stack and lessons each one taught.
Upload a video, get instant AI feedback on posture, tempo, and impact. Free, no install.
Find local salsa & bachata clubs plus AI motion coaching. Built for working adults.
Yes. The trick is scope discipline plus AI coding tools. Start small, ship fast, only grow what survives.
Some via ads, some kept free for traffic validation, some experimental. Only survivors get reinvested in.
Cloudflare Workers + static HTML + minimal dependencies. Operating cost stays near zero.