A poor calendar app can easily make you less productive. If you find yourself in that situation, the Sunrise app is the solution. The app has an interface that is very easy to navigate and connects seamlessly with all major calendar services.
Android/Chrome/Web: Sunrise, our favorite calendar app for the iPhone, just made the jump to Android, and it's bringing all of its best features along for the ride. Sunrise is also getting a webapp—both designed to give you a productive view of your day.