Well I have never updated and I do know that it won't delete your apps but I was wondering, if it will delete the stuff in the apps ;I have this app called music Download thats were i get all my music from and I'm afraid that if I update I might lose all my music INSTAGRAM @dinosaur_face BTW::-)
Read more: If I update my iPhone 4S to iOS 7.1 will I loose the data in my apps?