Once downloaded, open the file. Your device may ask for permission to install apps from unknown sources.
If prompted, go to Settings > Security > Enable Unknown Sources.
Proceed with the installation and follow the on-screen instructions.
After installation, open the app and start using ARGA!
[Download for Android (APK)]
Note: By clicking on this link, you agree to install the APK version, which is fully functional but temporarily provided while the Play Store version is being published.