Clap-o-meter

A clap-o-meter, clapometer or applause meter is a measurement instrument that purports to measure and display the volume of clapping or applause made by an audience. It can be used to indicate the popularity of contestants and decide the result of competitions based on audience popularity. Specific implementations may or may not be based on actual sound level meters. Clap-o-meters were a popular element in talent shows and television game shows in the 1950s and 1960s, most notably Opportunity Knocks, but have since been supplanted by other, more sophisticated, methods of measuring audience response.

Today, various digital implementations exist across different platforms. Mobile applications for iOS and Android offer portable measurement, while specialized browser-based tools or PC software provide solutions for live events. Some free-to-use software, such as the "Applaus-O-Meter", provide full features without advertisements or in-app purchases, often including event management tools like integrated timers.