Nothing in the history of money has been more diabolically efficient at getting us to spend than a smartphone. It’s an instant-gratification machine for music, games, takeout and catching a ride, anywhere, all the time. Now, however, your phone can prevent you from burning a hole in your wallet. A growing set of apps can help with the self-control that it takes to save money for the future. Apps like Acorns, Digit.co, Level Money and Mint track all the ways you spend to tell you in one glance how to stay on budget. Some even squirrel away extra cash before you blow it. Apps are key to getting millennials back on financial track. The generation America most likes fretting about—adults under 35—has a savings rate of negative 1.9%, says Moody’s Analytics chief economist Mark Zandi.

http://www.wsj.com/articles/these-apps-can-finally-get-you-to-save-money-1434477296