Most quant-prep tools are quizzes or PDFs — nothing like the actual job. Desk Simulator drops you into a realistic desk incident (a P&L break, a broken yield curve, a Monte Carlo Greek that won't reconcile) with a limited investigation budget. You earn evidence by running the right diagnostic tests, then submit a root cause, fix, and preventive controls — scored against what a real investigation needs to prove. Free, no signup, 3 incidents live at launch.