I have recently bought iphone 6s and I want to give my old phone (4S) to my niece as there?are paid apps that she needs to do her studies on. I want to know is there any way to put these apps on her phone with me paying for them but that the phones are not in sync with one another ie that she cant get into any of my messages emails etc. Any help would be appreciated as I am terrible with technology! Thanks in advance