Cost Split is the best bill splitting app to share IOUs and split expenses with friends to make sure that everyone gets paid back. Available for iOS also(find it out from app store: https://itunes.apple.com/us/app/apple-store/id1493346440?mt=8) Dividing expenses/bills with friends? Simply create a group and add members. Add expenses and free yourself from managing too many receipts. Track balances any time. Know whom you need to pay or take and how much without any calculations. Use Cost Spl