Do you want to be one ahead of the average nerd? Are you a server administrator tired of looking up HTTP response codes? Or are you just super bored?
Learn all the HTTP status code meanings by heart. This app provides a categorized reference, a training mode, and a test mode with progress tracking.
It is weirdly fun, if you are into this sort of thing.
Screenshots and download: see https://play.google.com/store/apps/details?id=net.meyfa.statuscodestrainer