Coupon or Cashback websites/apps

Anyone know any good coupon or cashback websites/apps? Trying to go to school this year saving instead of spending so much and not getting anything back from it. I’ve downloaded Ibotta wanted to try it out but some of the options they have on there are not things I really need right now as I’m getting ready to move back in for school. Really trying to save even more than ever until my refund check comes in😅😂😂