According to the UN, 55% of the world's population currently live in cities, with that percentage estimated to jump to 68% by 2050. So it's no wonder city officials are embracing digital transformation to make their urban areas smarter. Developers wishing to create applications for cities or with city data are in the right spot. To receive updates about Cities APIs, click the TRACK THIS CATEGORY button below. And, if you want updates from other ProgrammableWeb categories, be sure to click the track button on those category pages as well.