I've been giving system design interviews and as an introvert, practicing out loud is painful. You can't just think through it - you have to explain your thought process clearly, under time pressure, while someone pokes holes in everything.

Talking to yourself feels weird. Mocking with friends gets awkward fast. And every tool out there teaches concepts, but none of them make you practice the actual skill - talking through a design while someone pushes back.

• Real-time voice conversation

• AI sees your whiteboard live

• Contextual follow-up questions

• Scored on a real interview

• gamifications