Key logger or spy app for ipad - SiMSZONE

Hello i am wondering if there is an App i can secretly put on my son Ipad that will let me see what he is doing on his ipad. I have caught him with drugs and i dont play with that stuff. I want to let him hold on to his ipad so i can see what he is up to and bust his ass. I hate being lied to and i just have a hutch that he is still doing Bad. After searching for "download keylogger for mac" online, i have got some like download keylogger for mac and download mac keylogger, seems great. But i am not sure if they can be used on ipad..........So please let me know where to find a keylogger for ipad, thanks.