EpiSurveyor is a free mobile phone- and web-based data collection system. It is e.g. used for the collection of information regarding clinic supervision, vaccination coverage, or outbreak response, and it helps to identify and manage important public health issues including HIV/AIDS, malaria, and measles. As of April 2012, EpiSurveyor, home based in Kenya, has nearly 8,000 users in more than 170 countries worldwide including the US, Kenya, Guatemala, the UK, Tanzania, India, Pakistan, Mali, the Philippines, Zambia, Malawi, Nigeria, Peru, Brazil, Indonesia, and Liberia, making it the most widely-used mHealth software. Also included are the 15 sub-Saharan African countries where it has been implemented in conjunction with the World Health Organization's African Regional Office (WHO/AFRO).
Examples: In 2008, Kenyan health workers used EpiSurveyor to track an emergency vaccination campaign against polio and managed to stop a potential epidemic in its tracks. In 2010, the application was successfully trialed for feasibility and scalability in a pilot in Malawi to monitor the availability of malaria medicines with mobile phones.