3.14 - Memorize Pi Digits

Pi is constant, it is represented by the Greek letter π. The numerical value of π is 3.1415926.......

Pi is infinite series irrational number.

From wikipedia:
Piphilology is the practice of memorizing large numbers of digits of π, and world-records are kept by the Guinness World Records. The record for memorizing digits of π, certified by Guinness World Records, is 70,000 digits, recited in India by Rajveer Meena in 9 hours and 27 minutes on 21 March 2015.

This app is a tool to help you memorize pi digits.