PLC Simulator PLC Trainer is a free iPhone app designed to help beginners learn the basics of PLCs and experiment with simple programming. The app consists of three main sections: "How a PLC works," "PLC Block Diagram," and the PLC Simulator. With the simulator, users can develop simple programming skills using 3 timers, 2 counters, 6 compare instructions, 2 binary outputs, and 3 RES outputs. The user interface is intuitive, and there is an information icon for first-time users to easily understand how to program.

One notable feature of this app is the NEW SAVE function, which allows users to start a program and continue it at a later time. Additionally, PLC Simulator PLC Trainer helps users better understand the exam-off instruction, "Seal-In" or "Latching" logic, and motor start/stop circuits.

Whether you're new to PLCs or studying Mechatronics, this app is a valuable tool. Give it a try and explore the fascinating world of PLCs.