The $0 Infra Budget Tracker: How I Serve Users With Literally Zero Server Costs

I built a budgeting app with zero backend infrastructure. No servers. No database. No hosting bill. No monthly recurring cost of any kind. Zero. Dollars. Per. Month. And I'm not talking about a free tier that'll hit its limits and surprise me with a $200 bill in three months. I mean architecturally zero -- there is no server-side code to run, so there's literally nothing to pay for. Here's exactly how it works, and why I think more developers should be building this way. The Stack Monee is a static React app deployed on Vercel's free tier. The complete infrastructure picture: Frontend: React + Vite (static files) Storage: localStorage (the browser itself) Hosting: Vercel (free tier, static sites don't hit compute limits) Auth: None (nothing to authenticate against) Database: None (your browser is the database) That's it. No AWS, no Supabase, no Firebase, no Planetscale, no Redis, no anything. How Data Persistence Works // This is the entire "database layer" const saveTransactions = ( t