"Time Cost Calculator" is an app that allows you to easily calculate the labor hours required for a purchase by converting the purchase amount from your hourly wage, monthly income, annual income, and total working hours. In addition to directly inputting hourly wages, it is also possible to automatically convert monthly or annual income. We help you use your money wisely by visualizing the cost performance of shopping and investments. This calculation tool is recommended for those who are thinking about optimizing and saving their spending.