This phrase refers to a specific type of application file, designed for devices operating on the Android platform, that facilitates the execution of a digital game. The game itself, as suggested by the Japanese words, centers around a play activity akin to tag, typically played after school. The ‘apk’ portion denotes the file format used for distributing and installing applications on Android operating systems.
Such applications provide readily accessible entertainment, often tailored to be engaging and easily playable on mobile devices. Historically, the availability of these files has broadened the reach of games, allowing individuals to download and install them directly, bypassing traditional app store channels. This has created opportunities for independent developers and niche game titles to find an audience.