A guided practice instrument with an interactive biofeedback bar. The bar in front of you responds to your thoughts — this site teaches you, step by step, how to read it and how to use it.
The instrument itself is free to try, but the practice is a guided progression: each step builds on the last, and later steps assume you have genuinely absorbed the earlier ones. That is why lessons live behind a login, why each step ends in a short quiz before the next unlocks, and why the full curriculum is subscription-only. It protects you from jumping ahead into material you are not ready for.