Photos

An application was installed on Petronella Osgood's computer by 10 May 2020. Its logo was a white circle with a shape in its centre consisting of the colours orange, yellow, green, teal, blue, purple, red, and dark orange. (WC: The Zygon Isolation)

Behind the scenes
While the application was not named in WC: The Zygon Isolation, the application was named "Photos", or "Apple Photos", in the real world, and was a photo management and editing application,