Bing found the following results
APK File (What It Is and How to Open One) - Lifewire
How to Open APK Files on Windows 10? [Here Are 4 Methods]
Open APK File on Android, PC, Mac, iOS [How to Guide]
APK File - What is an .apk file and how do I open it? - FileInfo.com
What Is An APK File And How To Open It [APK Opener Tools]
How to Open APK Files on Windows PC (4 Easy Ways)
What is an APK file and how to install on Android? - NextPit
How to Open APK File on All Operating Systems? – DigitBin
What is an APK file? - Android Authority
How to Open an APK File? (APK File Opener) - Guru99