For questions about Android apps in general. (If possible, use a specific application's tag instead.) Note that Development is off-topic here.
This tag is for questions regarding apps that can be installed on an Android device. Because there are a number of unique issues regarding apps that you pay for, you should consider adding the more specific paid-apps tag if your question relates to one of these issues.
Do not use this tag if there is an application-specific tag for the app you are asking about. For example, use gmail for the Gmail app.