SQUARE has come up with payment processing app for iPad. The Square Register app is integrated with Square credit card reader that not only provide solution for Point-of-Sales system but also analyze the day-to-day transactions in chronological form. The system is fully customization in terms of securing the functions from for unwanted access and reporting. This revolutionary system is very useful for small retailers and billings in restaurants but it still relies on Square payment processing system for which they charge 2.75 per transaction. BUY it here