Do you want to find out how fast your brain is? Are you constantly striving to become better? If the answer is yes for any of these questions, you should download "Subtract One" app. "Subtract One" allows you to see how fast you can think. It will give you a score at the end of the game. You have one minute to calculate as many numbers as possible. At the end of the round, you will be able to see how many points you have. In order to get a point, you need to subtract one from each digit of the given number. For example, "3927" turns into "2816" because you subtracted one from each digit. If you get the number correct, you get a point, and if you get the number wrong, you lose a point. "Subtract One" is an app for you to see how fast you can process numbers. It can be used on iPhone, iPod Touch and iPad. It is simple, easy to use, and very fun. You will have a lot of fun using this app. Main Features ◉ Keeps count of score ◉ Time Limit ◉ User-friendly interface ◉ Easy to use