What is the Stone Wall Solitaire game, how does it work?

According to the introduction of IGC Mobile s.r.o., Stone Wall Solitaire is a Card game on the Android platform. There is currently a 5.0.1621 version released on Mar 06, 2020, you can see the details below.

RULES: Complete all Foundations in suit, from A to K.

Face-up cards in the Tableau should be build in sequence down, alternating color. Move face-up card groups in sequence down in alternate color. Put any card to an empty column. Doubleclick the Reserve to move the bottom card to the top of the stack

Make sure that third-party apps are allowed on your device: go to Menu->Settings->Security-> and check "Unknown Sources"

Tap the APK file. Allow the app any required permissions it asks for. Then, at the bottom of the installer window, click INSTALL.

You'll see a confirmation the app is installed. Now you'll see the app available in your list of installed apps.