$5 latte + $6 + 1 hour ($50 in opportunity cost?) for a round trip. It adds up if you do the latte thing every day. How many people in this country spend $3k/y

$5 latte + $6 + 1 hour ($50 in opportunity cost?) for a round trip. It adds up if you do the latte thing every day. How many people in this country spend $3k/year in lattes but don't invest $3k/year for their retirement. Wasn't there an app that did just that - rounded up your spending to put the remainder in an investment account?