Mobile crowdsourcing in the wild: challenges from a global community.

Recent research has been devoted to designing applications that encourage users to complete microtasks in everyday context, known as mobile crowdsourcing. In this case study, we present our ongoing effort of a publicly-available application, Crowdsource, that has over 540,000 global users from 200 countries or regions. Over 15 million sessions have been performed since the initial launch in August 2016. To better support usersu0027 motivations and goals, we conducted a survey with our active users and validate their feedback with a set of usability studies. Our findings suggest design considerations for crowdsourcing microtasks with users at the global scale.