looking for an app that will let me use an android tablet has a camera viewer for a galaxy s7

[TB-1599]

Ok so this is a little confusing.. We are having a party next weekend. I downloaded a photo booth app for my old GS7 but I dont want to use the selfie camera. I want to use the rear facing camera. So I want to use my tablet as my viewer so people can line them selves up and get ready for posses. Any ideas? (non rooted devices BTW)