Productivity Challenge Timer is a Pomodoro timer which aims to help you be more productive, more focused, waste less time and so on, you already know all that stuff.What this app is about is challenging you to work and study harder and tracking your work habits. You’ll earn/lose ranks depending on your performance, earn achievements and track your productivity over time, so you’ll know how long you worked on what and during which days of the week and hours of the day you’re at your most productive.