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- Sometimes, after a trip to the supermarket for shopping, it turns out that you forgot to buy something. Or, when you go on vacation, you find that you need something that has forgotten at home. This application can help you not to forget anything when shopping, when going on vacation and in many other life situations. - For example, before going to the supermarket, you open the refrigerator and cabinets in the kitchen and note in the application what you need to buy (just slide the slider left or right). Then, in the supermarket, you look at the application and buy what you need. - By default, some categories are already installed in the application. You can add your own categories (for example, “Cottage”, “Campaign”, “Business trip”, etc.). To add a new category, press the (+) button. To delete a category you do not need, along with everything that it contains, simply swipe this category to the left. - In each category, for example, products for the "Food" category, have already been introduced. You can add there what you need by clicking on the (+) button. Or delete what you don’t need by swiping the line to the left. - The slider of each product turns red if the stock runs out (less than 1/4 of the total stock), green if there is a lot (more than 3/4 of the total stock), or yellow in other cases. - The round gray button at the top left is needed for sequential switching of the display: “all” products or only “red” or only “yellow” or only “green” or again “all” and so on. The color of this button changes according to what products you see (“everything” is gray, only “red” is red, only “yellow” is yellow, only “green” is green). - The "sun" button is needed to display a list of all categories. - It is convenient in the supermarket to turn on the display of all the "red" products and walk with the cart from shelf to shelf. It is convenient to immediately shift each product put into the basket right (from "red" to "green"), so you will see what has already been bought and what remains to be bought. - Once upon a time, in the ancient Hanseatic city of Königsberg, someone came up with a wonderful device that hung in every German kitchen for a century and a half and helped housewives in the household. I made this application after I saw this witty device in the Königsberg Museum.