Supermarket Shopping App Development

I need a mobile app for a supermarket that provides online shopping and delivery functionality. The app should be available on both iOS and Android platforms.

Key Requirements:
- User-friendly interface for seamless online shopping
- Efficient and reliable delivery system integration
- Secure payment gateway
- Real-time order tracking
- User accounts with order history
- Search and filter options for products
- Prominent display of discounts and offers

Ideal Skills and Experience:
- Proven experience in mobile app development for both iOS and Android
- Strong background in e-commerce app development
- Expertise in UI/UX design
- Knowledge of secure payment integration
- Ability to deliver within a month