There was a day I needed an app on my phone, and the network was a bit slower to download the application. I had to chat up one of my friend to share the app with me on whatsapp of which he was unable to share, out of my curiosity I coughed out this step by step guide on how to share applications and any other files (not supported by whatsapp) through whatsapp.
Step 1: Locate the app file (.apk), or you will first back up the app and locate it’s file.
Step 2: Long click on the app file to rename it’s extension.
Step 3: Rename file extension from (.apk) to (.doc, .pdf, .docx) or any supported extension by whatsapp.
Step 4: Share the file, the recipient will go through same steps, rename the extension, install and enjoy the application.
Kindly share post with your friend.