Listing Website & Mobile App Guidance

I'm in the early stages of building a product listing website and accompanying mobile app. I'm looking for a knowledgeable individual who can help me understand the project better, guide me on how to start, and help me budget for it.

Key Features:
- User reviews and ratings
- Advanced search filters
- Seller profiles

The mobile app needs to be developed for both iOS and Android along with website

Ideal Skills:
- Strong understanding of website, iOS and Android development
- Excellent budget planning skills
- Knowledge of user review systems, search filters and seller profiles
- Good communicator, capable of explaining complex concepts in simple terms
- Experience in website and mobile app development is an asset