Can iPhone 4S take pictures on a timer?

So my friend has this phone (not and apple phone) and he has set it up so he can turn on his camera, set his phone down aiming it towards a group of people, and say a code word (he set his as whiskey) and it will snap a picture.

Can an iPhone 4S do anything like that? Or even a timer or something? If so, how?

Not through the default camera app but there several that can. I'm not sure if Camera+ is one of those but you could check.

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