Mobile applications show great potential for the assessment and registration of information regarding headaches. However, data on the content and usability of mobile applications for headache that are accessible to the public in European Portuguese are scarce. Therefore, this study aims to search for and characterize the mobile applications related to headache in terms of content and usability. A search in the Android app store of applications was conducted. Four mobile applications were found

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... n European Portuguese (Diário da Cefaleia, Diário da Dor, Dor de Cabeça e Registo Simples) that matched a set of predefined criteria. These were characterized in terms of content general characteristics, content and usability. Three of the apps were specific for headache and one could be used for any type of pain, including headache. All apps allow recording pain characteristics and its extraction in a form of a report.