How to write a story on an iPhone

Help me please try and keen how to write a story in my iPhone

Hi! Please check out my story The Girls Guide To Growing Up. It's not fan fiction but it answers all questions that girls have ever asked about anything and I would really appreciate it. We'll tell you what every one else won't and in the most comfortable way! High school, love, sex, sexuality, and suicidal tendencies are just a few of the things we'll address in this book created by girls, for girls.