If you are interested in using the FMWA on your Android device, then you have to download FM WhatsApp APK file. Unfortunately, this version of WhatsApp is not available on the Google Play Store.
This is due to the fact that the developers of the stock WhatsApp cannot allow a modded version of their application on the Google Play Store. Thankfully unlike iOS, Android allows you to sideload applications on your device.
This is made possible with the help of APK installer files. Similarly, if you want to FMWhatsApp download and install for Android on your device, then you have to do it via its APK file.