Xebia Essentials is a free Android application that offers a deck of flash cards related to software craftsmanship. The app is designed for both phones and tablets and provides a simple and intuitive interface to browse through all the cards or search for specific ones. One of the best features of this app is that it requires no special permissions, making it easy to download and use.

The flash cards available in Xebia Essentials cover a wide range of topics related to software development, and the app allows you to scan your Xebia Essentials cards from anywhere. Additionally, you can easily share the cards with others, making it a great tool for teams or groups who are working on improving their software development skills. Overall, Xebia Essentials is a handy and useful app for anyone interested in software craftsmanship.