IPhone 5S apps different than iPhone 4S?

My friend said that you can't download same apps on iPhone 5S as the iPhone 4S. I wanna know if this is true or not?

Half and half, there are about 1, 000, 000 apps on the AppStore and about over 900, 000 apps have been updated to be compatable on iPhone 5 and up, all of the popular apps and games have been updated to work on iPhone 5 and up. YOU CAN DOWNLOAD THE SAME APPS

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