The term refers to a category of entertainment applications designed for mobile devices using the Android operating system, distributed in the Android Package Kit format. These applications typically feature adult-oriented content and are often accessed through unofficial channels due to platform restrictions. An example would be a game featuring explicit sexual themes available for download as an .apk file for Android devices.
The significance of this segment lies in its appeal to a specific demographic seeking unrestricted access to adult content on mobile platforms. Historically, this demand has led to a decentralized distribution network, outside of established app stores, raising concerns regarding security and content moderation. The ease of access and portability afforded by Android devices contributes to the ongoing demand, despite potential risks.