Finite State Machine FREE is an Android app developed by Mountain Reacher. It is a free educational and reference tool that implements an algorithm to reduce a finite state machine.

A finite-state machine, also known as a state machine, is a mathematical model of computation used in computer programming and sequential logic circuits. It represents a system that can be in one of a finite number of states at any given time. The state can change based on triggering events or conditions, known as transitions. The app provides a list of states and their corresponding triggering conditions for each transition.

The app showcases the behavior of state machines in various real-world devices, such as vending machines, elevators, traffic lights, and combination locks. It demonstrates how these devices perform a predetermined sequence of actions based on the events they encounter.

Finite State Machine FREE is a valuable tool for those interested in electronic design automation, communication protocol design, language parsing, and other engineering applications. It can also be useful in biology and artificial intelligence research to describe neurological systems and natural language grammars.