For California used-car deals at $50,000 or less: the last day a buyer can cancel, the 400-mile limit and the most you can charge to restock. Free, no sign-up.
OkClerk keeps the 3-day clock for every deal you sign, reminds you before the window closes, and keeps the records for two years. It works from your email.
Based on Civil Code §§1784.31 and 1784.43. Not covered: vehicles over $50,000, wholesale and fleet sales, motorcycles, vehicles of 10,000 lbs GVWR or more. This is a plain-language tool, not legal advice.