This is an iPhone version of the NormalDist iPad app recently developed for educational purposes. Students taking statistics classes struggle with problem solving. An app helps students better understand practical problems related to probability calculations, mapping them to normal distribution, and perform calculations. App generates randomized quizzes in four different categories. After completing and submitting answers students are receiving a feedback allowing them to review their answers and solutions to similar problems. App includes z-table. Application can be used individually and in the classroom as exam preparation tool.