Good but freezes sometimes – Pi Numbers Memory Game Review

This is an amazing way to learn the digits of pi and my goal is to learn the 1,000 digits this app has to offer. The only negative thing is that sometimes it freezes either at the home page of the app or [rarely] while I'm in the process of typing the digits. Maybe also more digits would be good.
Review by Jngfuyfdgjgvjgfcvh on Pi Numbers Memory Game.