Boolean Lab is an interactive and visual explanation of boolean variables, logic functions, and their behavior. This educational app is developed by Pavel Kříž and is available for free download on Android devices. The app contains 24 interactive logic circuits that allow users to learn about the different logic gates and their behavior.

The app's interface is user-friendly, and the interactive features make it easy to understand the concepts of boolean logic. The app provides a clear explanation of each logic function, its type, truth table, and gate. The app also allows users to change input variables, and the changes are immediately reflected in the truth table and on the input and output of gates.

Users can set the label logical values either in shape or H-L 1-0 or T-F, marking the log function F or Y, and indicate the clock signal T, C, or E. Overall, Boolean Lab is an excellent tool for anyone looking to learn about boolean logic and its applications.