iSum is extremely useful app for tracking numbers, expenses and time. App design is simple and clear for fast usage on the go. iSum will remove the headache of using complex spreadsheet apps on your iPhone - you will actually use this app! Forget clumsy use of computer whenever you need to enter or update just a few numbers. Snap your iPhone out of your pocket and enter updates into iSum. It can be time, expenses, sizes, or even things like body temperature or number of heart beats - practically anything that can be represented by numbers. Lists can be exported to computer later. With introduction of negative numbers in this version you can also track BALANCE; for example; if you give money advance to somebody and he will be spending it in several smaller chunks, you can keep track of the balance and easily see when the advance will be fully spent. Features: * Creation, reordering, renaming, deleting of basic groups * Fast number adding * Add negative numbers and track balance * Short notes for each entered number * Edit date of entry * Total Sum * Sum for: running month, last month, running week and last week * Average for: running month, last month, running week and last week * Exporting CSV file by email. CSV file can be imported into your favorite spreadsheet application on your computer.