Responsible spending is the hallmark of being an adult. Let Mint help you grow up and keep track of your bank account. This app automatically compiles your recent transactions, even the ones you wish you could forget like the triple digit dinner out last weekend. Other features include bill pay reminders and the ability to deactivate the account remotely if you ever lose your device. Plus Mint will create personalized infographics so you can visualize your money, after all knowledge is power.