Downloading

Go to the Latest Release page and download the file com.sine.voicecraft.maui.apk.

Installing

Go to where you have downloaded the com.sine.voicecraft.maui.apk file in your file manager and open the file. This will open the android app installer (which may vary between devices and OS's) and click on the install button. If a google protection screen comes up, you can click on More Info and click on Install Anyways.

Launching

You can just open the app like any normal mobile application in your home screen.