Stillpig today announces Sum Machine 1.1, their latest productivity app for iOS devices. Quickly add up a list of items and prices via intuitive custom keyboard. It is very useful during shopping, for inventory control, budgeting and more. Each entry allows for unit price, number of units and name. It then shows the subtotal for the entry and the running total up to the entry. The resultant list can be saved for later use or emailed to yourself or friends to further edit in Excel.