Great app, but... – Me: A Kid's Diary by Tinybop Review

I have the app on my iPhone 6 running iOS 9.3.2 and it works great! But, on my daughters iPhone 4s running iOS 7.1.2 it crashes when, after creating avatar and selecting favorite color, the checkmark to confirm the color is clicked. Please fix fast!
Review by Tprddy on Me: A Kid's Diary by Tinybop.