I've looked at several, there are even some for my Iphone. BUT I've never done them. I have a load of injuries so prefer to make sure I've got someone to correct my technique if needed and to show me the correct way of doing something. I'd suggest a session with a PT or in a gym and then take those exercises home with you. If you're doing the exercises correctly, you are much more likely to get the most out of the exercises you're doing.

HTH

MG