Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

terminal

A window where you type commands for the computer to run.

A terminal runs a shell (PowerShell, zsh, bash) that reads commands, runs programs and shows their text output.