Security researchers have identified AppSafe Club as a source of "pesky unwanted adware or malware" that can plague Android devices or emulators.

Users searching for this link are usually trying to install mobile applications on their PC. While itself is a safe, legitimate emulator for Windows and macOS when downloaded from its official site, the apps you run inside it are only as safe as their source.

How To Tell if an App is Safe to Download from Google Play Store