The main purpose of this application is to provide a tool to test your ability to concentrate at varying times of the day. You may be a morning person or an evening person. Find out for sure. Then, when you are under pressure to learn or study or just be at your finest, you will know when to give it your best shot.
Return to test yourself at different times of the day and night.
Or, you can just play games, have contests, have fun.
Simply type the numbers you see displayed and press the [Enter] key.