10+2x5 works like this:

  1. Work for 10 minutes
  2. Take a 2 minute break
  3. Repeat 5 times

You have just worked 50 productive minutes in one hour!

It's a productivity hack called the:

(10+2)x5 Dash

How this application works:

The timer goes for 10 minutes, then a blue rectangle disappears. Then the timer goes for another 2 minutes and an orange rectangle disappears. Once all rectangles have disappeared, it has been one hour. Pat yourself on the back for working so hard.