Most apps don’t fail because of bad code; they fail due to confusing onboarding, weak retention, feature overload, friction, and poor product decisions. After analysing 4000+ apps, I noticed the same patterns repeating everywhere. So I created “50 Mistakes Across 4000 Apps”, a free practical guide covering UX, onboarding, retention, growth, and product mistakes for founders, PMs, indie hackers, and startup teams. 🚀