It's the best habit tracker out there but it's not the best it can possibly be. After a substantial amount of thought, I succumbed and shelled out the 10 euros for the premium version to be able to use the widget, which is essential to keep me on track. However, the widget doesn't respond unless the application is opened beforehand, so minus one star for that. Also, a true black widget or user-interface would be very nice for AMOLED screens, so fingers crossed for that too.