The JustFoldMe App is a companion tool for our innovative JustFoldMe perforated cardboard sheets, which enables you to create any cardboard box in under a minute. Just choose the cardboard sheet you are working with and insert the dimensions of the box you wish to create that's it! Follow the easy step-by-step instructions and you are ready to ship any size cardboard box in a matter of minutes. HOW DOES IT WORK: 1. Chooser you preferred measuring units (inch/cm) 2. Choose the cardboard sheet you are woking with 3. Type the size of the product you want to ship 4. Follow the step-by-step instructions and your packaging is done The App also includes a short video tutorial if you might have any problems making your box Enjoy