What is an appraisal contingency?
It lets you renegotiate or cancel if the lender's appraisal comes in below your price, so you are not forced to cover the gap. ListingCraft for Buyers includes appraisal as a contingency option in your offer and tracks its deadline.
Checking the price against sold comps before you offer, which ListingCraft for Buyers does for you, lowers the chance of a low appraisal.