Lidec is an app to help you never be embarrassed again when paying for your purchases at the supermarket. The application main purpose is to help in your groceries purchases management in order to not exceed the amount of money you got available for paying for your purchases. It brings fields to insert the amount of money you have, the amount of money you want preferably to spend and the maximum amount of money you intend to spend. When you enter these values, the application will show, as you enter products, different line colors depending on the sum up to that point. In the preferred margin, the lines are blue. Over passing the preferably amount and within the maximum amount, the lines turn to yellow color and sum above the maximum amount turns the lines to red. With this data in hand, you can better organize the purchase by changing the amount of some item or even excluding items. You can also move products up and down so you can leave the most important off the red or yellow lines.