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Existing crowdsourcing markets are often inaccessible to workers living at the bottom of the economic pyramid. we present Mobileworks, a mobile phoneYbased crowdsourcing platform intended to provide employment to developing world users. Mobileworks provides human optical character recognition (OCR) tasks that can be completed by workers on lowYend mobile phones through a web browser. to adY dress the limited screen resolution available on lowYend phones, Mobileworks divides documents into many small pieces and sends each piece to a different worker. An initial pilot study with 10 users over a two month period revealed that it is feasible to do basic OCR tasks using a simple moY bile webYbased application. we find that workers using MoY bileworks average 120 tasks per hour at an accuracy rate of 99% using a multiple entry solution. In addition, users had a positive experience with Mobileworks: all study partiY cipants would recommend Mobileworks to friends and famY ily.