HOW CAN I BACK UP IPHONE APPS AND THEIR DATA (APPS BOUGHT FROM ITUNES AND DOWNLOADED FROM ELSEWHERE) TO MY PC?

I’ve got a jailbroken iphone. I’ve got a little apps that i have used and have a lot of records on, a little programs paid for on itunes. For e.g. note programs, and i unequivocally need to behind them up to my pc in box something happens to the iphone. How can i do this?