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How big of a money maker are apps? What country's GDP is the size of the global app economy? How does app use compare to TV in terms of time spent per day? WSJ's Jason Bellini has answers. Click here to subscribe to our channel: http://www.youtube.com/wsj Visit us on Facebook: http://www.facebook.com/wsjlive Follow us on Twitter: https://twitter.com/WSJLive Visit the Wall Street Journal: www.wsj.com