The name says it all: YNAB is an incredibly detailed but easy-to-use budget interface. The software operates by four simple rules: 1) Give every dollar a job, 2) Save for a rainy day, 3) Roll with the punches, and 4) Live on last month's income. YNAB's goal is to change the way you manage money and to create stress-free finances. The app is supplemental to the $60 software you purchase for your Windows or Mac and is meant to allow users to check their transactions and budgetary restrictions on-the-go. If you are looking to turn your finances around or gain a better understanding of your financial situation, purchasing the software is well worth the investment.