My high school aged son needed a calculator for his math class. I searched around the house but couldn't find one that I thought I had. So, since there's an app for everything, I decided to look for one to download for him. I found this calculator app and it's free price tag immediately caught my attention. Then I saw it had over 700,000 downloads and I knew this had to be a good one. There are too many features to list, but let me say, they combine to make an impressive app. It's helping him in his math class and some of his friends even downloaded it because it works so well.