It is a handy tool to do the calculation when people share a common/shared account.It is a handy tool to do the calculation when people share a common account. Useful for friends living togather, they spend money in a common account. But its hardly a case that all the people will spend same amount of money, here you need this tool. Enter the money spent by each member and just a click away here it is all the calculations which person has to give how much to whom all calculated by the tool. And you are all free from the headache of managing calculations. Other scenario could be when a group of friends go on a trip or something.