Abstract: Methods, apparatus, systems and articles of manufacture to monitor media are disclosed. An example apparatus includes a software development kit provider to provide a software development kit to enable an application developer to create an application developer to create a monitoring enabled application. The example apparatus further includes a monitoring data receiver to receive data collected from a media device executing the monitoring enabled application, the data collected via the monitoring enabled application, the collected data including a media identifier and at least one of a device identifier or a user identifier. The example apparatus further includes a data store to store the collected data, and a database proprietor interface to request demographic information from a database proprietor, the database proprietor interface to store the demographic information in association with the media identifier in the data store.