Download the Global Studio Associates (Note! this app available in Android 8.0 or latest)
You may see a pop-up asking if you want to let your browser save files to your phone's storage. Accept this. (If see a warning that "This type of file can harm your device." Just click OK to continue.)
Navigate to your phone Settings > then to the Security settings > and check Unknown Sources to allow your phone to install apps from Unknown Sources option.
Use a File Browser / File Manager > then navigate to your download folder. and Tap the APK file. Allow the app any required permissions it asks for. Then, at the bottom of the installer window, click INSTALL.
The app should safely install by see a confirmation the app is installed. Now you'll see the app available in your list of installed apps.