Doorstep tracks your real buying power daily using live mortgage rates from the Federal Reserve. Unlike calculators that give you one number and forget you, Doorstep monitors how rate changes move your affordability, a 1% shift can mean $50K+ in buying power. Enter your income, debts, and savings. Get a readiness score across 7 dimensions, a personalized action plan to close the gap, and browse homes filtered to what you can actually afford. No lender needed. No credit pull. Completely free.