No Cash, No Checks, No Problem Peer-to-peer payment apps are one of the newest ways to send money. Share | Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Contents Saving for College 101 Here’s a crash course on saving for college. Life and Death of a Twenty Dollar Bill How long does a $20 bill last? Historical Inflation This calculator shows how inflation over the years has impacted purchasing power.