Microsoft plans to bring Cortana, its Windows phone personal assistant technology, to both Apple and Android devices, Reuters reports. The company is reported to be developing an advanced version of its Siri competitor based on an artificial intelligence project it has dubbed “Einstein.” Microsoft’s new CEO, Satya Nadella, has been more aggressively opening up the company’s software to non-Windows platforms, eschewing Microsoft’s traditional approach of forcing customers into using its Windows operating system. Cortana debuted on Windows phones last year, and will be coming to the desktop with Windows 10 later this year. According to people familiar with the project, Microsoft also plans to release a standalone iOS app version of the technology. New technology in Cortana to be rolled out this fall is expected to incorporate more advanced features, such as the ability to read and understand e-mail and more accurately anticipate user needs, rather than simply responding to requests as Siri does.