From ITO SOFT DESIGN:
"ioTouch" is an iPhone/iPod touch application which enables you to monitor and manipulate PLC(Programmable Logic Controller*1) devices easily, without the expert knowledge.
*1 PLC - A digital computer used for control of machinery on factory assembly lines, etc.
ioTouch connects PLC devices by Wi-Fi, so that you can take it with you easily. If your PLC devices support Ethernet, you just need to build a Wi-Fi. If they don't support Ethernet, ioTouch can connect them through a PC in which "PLC Share" is installed.
Supported a part of model of KEYENCE and MELSEC now.