This app aims to help improve your memory recall on digits of Pi and other mathematical constants by giving you access to a large array of different tools such as :
A Training mode where you can configure settings such as how much time you want to give yourself to recall the digits, what digit you start at and how many lives you get. Along with this you can bookmark certain settings for later use
Along with the training scene there is also an added Challenge mode where you can test how well you can recall digits of pi under timed circumstances. The high score system in the challenge mode allows you to test yourself and see if you have improved.
There is also a page that list out all the first 12 million digits of Pi. When tapping on these digits you can see what is the place of that digit.
Besides Pi you also have the option to learn other important mathematical constants such as Euler constant, Pythagoras's constant, golden ratio(Phi) and the natural log of 2.