What is the Crafts 3.0 application, how does it work?

According to the introduction of Danmar Computers LLC, Crafts 3.0 is a Education app on the Android platform. There is currently a na version released on Jan 23, 2020, you can see the details below.

This project’s objective is to support the professional development of handicraft teachers and trainers in Europe in their transition to the digital age.

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.