APP CRASHES INSTANTLY

I installed the app and it asked me to sign in or sign up, but as soon as I click sign up, the app crashes every single time. Wish this would work, as I am looking for a free flash card service... if I knew the paid version was working, I would even spend $9.99, but not sure how much better the paid version is compared to the free version since I could never try it.

MariaAbroad about gFlashcards Lite