How do I install the apps?

1. Open Settings and navigate to Updates & Security > For Developers.
2. Enable the sideload apps mode and tap yes when a message pops up on your screen.

for some phones, you might need a SD card, or need a laptop / desktop to install the apps to the device.

once you got the app on the phones storage, and have enabled the "sideload apps" option, open the files app, find your app, and install it!