App for Tracking Finances (Mint, Personal Capital, etc.)

[Bryan O.]

I've been reading about apps for helping to give quick overviews of my finances. Many people use Mint, and now it seems there is a more advanced and useful product called Personal Capital. The thing that has me stumped is security. If I am giving all of my bank account details for every account I own to some provider, what happens when (not if) they are hacked? Is there a way to grant "read only" access to my accounts? Can anyone explain what is in place to keep my money mine if I were to use an awesomely useful app like one of these?