Custom or modified APKs, like the one mentioned in the keyword, can offer benefits such as:
Downloading and installing files like this (APKs from unofficial sources) carries significant risks: Sekstube Pro AF 2.17-SpydogCustomMobile-arm64-v8a....
In mobile app circles, this often stands for "Auto-Focus" (in camera apps) or is sometimes used as a slang intensifier. However, there are also legitimate fitness apps like the AF App used for gym management. Custom or modified APKs, like the one mentioned