There's truly an app for everything, but I'm especially addicted to apps that help with my health and fitness goals. Yeah, I'm still waiting for an app that gives me a little shock every time I think about Girl Scout cookies (OMG, samoas), but til then, these health and fitness apps are the next best thing.
On the App Store at: itunes.apple.com
This app is the perfect blend of Instagram and Pinterest and every great fitness app ever - FitStaPin? Anyway, it allows you to share fitness photos and quotes, and you can sign up to do fitness challenges. I love this one!