Simple iOS Math App

I need a basic arithmetic iOS app. It should be simple and easy to use, focusing on basic arithmetic operations like addition, subtraction, multiplication, and division.

Key requirements:
- Development platform: iOS
- Core functionality: Basic arithmetic operations
- User profiles: The app need to support multiple user profiles.

Ideal skills and experience for the job:
- Proficiency in iOS app development
- Strong understanding of UI/UX principles for simplicity and ease of use
- Experience in creating educational apps, preferably math-related.