High School Story Hack Books - High School Story Cheats Books?

I love the high school story game and I play it on my iPhone but it is difficult and I want to hack it
It would be great to hack books or gems.
Anyone have sth like this?

Sure, I used hack from http://highschoolstoryhack.com
It worked fine for me.
you can add gems, coins, rings and books.
It should work with any iOS version