A display device includes a main body degree of opening detecting unit that detects that a degree of opening of the main body is in a first style state that satisfies a style condition. A main body tilt detecting unit detects that a tilt of the main body is in a second style state that satisfies a style condition. A dual-screen display control unit, in response to detection that a degree of opening of the main body is in a first style state, and to detection that a tilt of the main body is in a second style state, causes an app image for a first app associated with the style states to appear on a first screen, and causes an app image for a second app associated with the style states to appear on a second screen. A style-based processing execution unit performs processing associated with the style states by use of the apps.