APP Engineering, Inc. is an OEM (Original Equipment Manufacturer) that specializes in the design, manufacturing, programming, and testing of multifunction recording instruments. Our equipment is primarily used by electric utility companies and large industrial plants to record power line interruptions, faults, disturbances, and power quality. APP Engineering, Inc. is a customer oriented business with open access to top level management and product design engineers. We bring more than 40 years of combined experience as original equipment manufacturer.