(all) in one

Simultaneously; happening or existing at the same time or in the same entity. Usually used in reference to someone or something that serves multiple roles or has multiple purposes. They're advertising their latest product as a blender, food processor, and juicer all in one. As an intern at the publishing house, I was basically a personal assistant, gofer, proofreader, and warehouse laborer in one. This is a great little tool because it's a screwdriver, wrench, and hammer all in one—all you need to do is change the attachment.

in ˈone

used to say that somebody/something has different roles, contains different things or is used for different purposes: She’s a mother and company director in one. ♢ It’s a public relations office, a press office and a private office all in one.