Paste your Anthropic API key. It is saved only in this browser, on this device. It is never uploaded anywhere except directly to api.anthropic.com, and it is not in the page's source code. If you clear your browser data you will need to paste it again. Get one at console.anthropic.com.
Leave this off when the phone is on speaker. With it on, the mic stays live while the tutor talks so you can cut in by voice — but on a speaker it will hear itself and talk over you. With it off, tap the screen to interrupt instead.
If it keeps mishearing you, try another one — the recogniser is tuned differently for each and one may fit your accent better.
Your progress lives in this browser only. Copy it somewhere safe if you are about to clear your browser or switch phones.