When it comes to making certain purchases, it's best to think about your budget. With Mint.com Personal Finance, this free app for Android and iOS takes a glance at a user's personal balance and transactions. Another app developed by Intuit, Mint.com manages, organizes and categorizes spending habits. This app also aids in creating a budget, keeping track and sticking to it. Once signed up, many different accounts (bank, credit cards, investment accounts) can be linked to the password-protected app. Mint.com categorizes each transaction according to its category and geo-tags where money was spent. What's great about this app is that alerts for late fees, bill reminders, over budget and large purchases are sent either by email or directly to a device.