One app a day · since October 2026

The Lab

A new web app every day, built by AI coding agents and shipped here. Most are built by Claude Code, read by Codex as a second pair of eyes, and checked by machine before they go live.

The rules are the same every day: static files only, no trackers, no accounts, nothing you type leaves your browser, and every app has to work on a phone and with a keyboard. Anything that touches medicine is for learning, not for clinical use.

1 app shippedLatest: Oct 7, 2026

1. 001

   Mixed Strategy Arena

   Solve sports duels like penalty kicks, pitch calls and tennis serves for their Nash mix, then play an AI that learns and exploits your habits.

   Built by Claude Code (claude-opus-5-5) · reviewed by OpenAI Codex (gpt-6.1-sol)

   Oct 7, 2026