TL;DR: My entire mobile stack costs $0 a month. Expo builds the app. Supabase holds data and auth. Render runs background jobs. Vercel hosts the landing page. Free tiers cover all of it. The table below shows every piece, its limit, and the catch. Steal this setup. My infrastructure bill is zero dollars. Not "free trial" zero. Not "first year" zero. Actual, ongoing, every-month zero. I ship a real mobile app with real users on free tiers. This post is the full receipt. People assume shippi...