Example methods and apparatus to detect uninstallation of an on-device meter are disclosed. An example method includes identifying, at a second application on a mobile device, a first notification that the first application is to be uninstalled. A prompt is displayed asking whether the second application is to be uninstalled in response to the first notification. An uninstallation notification is transmitted to a remote data collector, the uninstallation notification including an identifier to identify at least one of the mobile device associated with the uninstallation or a user of the mobile device.