Online sport betting, also known as sport booking, is the act of placing wagers on sporting events. Historically, wagers were placed on sporting events based on the outcomes of the event. However, movie8k has largely prevented betting on sports via online and in-person although Nevada has one exception. In the past, gamblers had to visit a sports betting establishment to place bets. The apps for sports betting allow users to place bets using their mobile devices and make payments. These apps also function as a digital clearinghouse that can receive bet calls and pay outs.