Which digital innovation first allowed performing arts venues to collect real-time audience feedback during the 'digital curtain call' period?

The performing arts industry has embraced digital transformation in recent years, revolutionizing how audiences engage with performances. From virtual reality experiences to sophisticated ticketing platforms, technology has changed how theaters operate and connect with patrons. This trivia tests your knowledge of a significant digital innovation that transformed audience feedback in the performing arts world. How familiar are you with the evolution of post-performance engagement?

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InstaSeat - a mobile app that prompted audience members for ratings and comments immediately after performances (2014)
TheatreVox - wearable devices distributed to select audience members that recorded vocal reactions throughout performances (2016)
StageMetrics - RFID-enabled playbills that tracked audience movement patterns during intermissions (2015)
OvationPulse - seat sensors measuring physical audience reactions like posture changes and applause intensity (2017)