SAP has announced the general availability of SAP Mobile Platform 3.0, a common software development kit (SDK) for developers to build apps for use by consumers, business partners as well as employees. SAP said National Grid, operator of an electricity and gas transmission network in the U.K., is an early adopter of the software. The company used the updated platform with other SAP tools to help 1,500 field engineers maintain the energy grid with iOS devices. Engineers are using the system for a variety of tasks, such as taking photos of repair or maintenance work done in the field. The photos are stored for transmission along with work history and other data when the devices come in contact with a Wi-Fi network. It thus creates savings on cellular data transmission costs. SAP says the SAP RAD software "delivers an incredibly powerful but simple user experience for our field engineers so they can focus on their day jobs," said Tina Sands, head of Information Systems for National Grid in the UK, in a statement.