Convert Python Code to Mobile Apps

I need an experienced developer to convert my existing Python code into Android and iOS applications. The Python file contains the interface and all necessary content. The app should retain the exercise tracking functionality from the original code, and should have a similar design to the existing Python interface.

Key Requirements:
- Convert Python code to Android/iOS apps
- Retain exercise tracking functionality
- Keep design similar to Python interface
- Add payment gateways: PayPal, Card Transfer, Apple Pay

Ideal Skills:
- Proficiency in Python and mobile app development (Android/iOS)
- Experience with integrating payment gateways
- Strong UI/UX design skills
- Prior work with fitness-related applications would be a plus.