Finite State Machines is an independent study app for learning and practicing FSM concepts through focused questions, explanations, and review tools. It is built for computer science students, self-taught developers, interview candidates, and anyone reviewing automata theory or compiler fundamentals. Study across four topic categories: Fundamentals, Practical Skills, Common Pitfalls, and Advanced Concepts. - 160 practice questions - Explanation included with every answer - FSRS spaced-repetition intervals to help you review at the right time - Weak-point heatmap to show where to focus next - Daily challenge for consistent practice - Mock exams for timed review - Offline practice with no account setup Use it to reinforce deterministic and nondeterministic machines, transitions, states, accepting conditions, design patterns, edge cases, and common mistakes. Independent study app for Finite State Machines practice. Not affiliated with, endorsed by, or sponsored by any company, certification body, exam operator, or vendor. All trademarks belong to their respective owners. Privacy: Practice offline, no login required.