An image forming apparatus comprising: a wireless communication circuitry configured to make a wireless communication with a portable information processing device including: a display unit for displaying a simplified job setting screen on the portable information processing device side; and an operation unit for displaying a full job setting screen on the image forming apparatus side; and a computer and a memory storing a program causing the computer to execute: a recognition step recognizing a portable information processing device that is within a communicable range through communication via the wireless communication circuitry; a job setting step receiving a job setting; and a job control step receiving a start instruction and executing the job in response to the start instruction, wherein the job setting step receives the job setting, which is made by use of the simplified job setting screen, from the portable information processing device, via the wireless communication circuitry after the portable information processing device falls within the communicable range or receives the job setting, which is made by use of the full job setting screen, from the operation unit; and the full job setting screen provides not only corresponding set items but also additional information on the item to the simplified job setting screen.