Tackle one of those pesky New Year’s resolutions with Day One, an app that’s dedicated to making it easy to journal. Users can add pictures, tag entries and sync posts across devices. It also has rich text options to let you put type in bold. It’s a bit of an investment at $4.99, and certainly not one that you should buy and let languish unused on your phone. If you want to journal, but find you never seem to have a pen and paper at the right time, check out Day One for its convenience and simplicity. $4.99, for iOS devices.