Simple yet Powerful Promo App

I'm in need of a mobile app with an accompanying web admin portal that allows for the management of promotional items. The app should be user-friendly yet powerful, enabling an administrator to manage available items based on specific criteria.

Key Features:
- Upon signing up, app users will be presented with relevant available items or services tailored to their provided information.
- The app will provide filtering and sorting options for the promotional items.

Technical Requirements:
- Professional quality Android and Apple mobile apps
- A web admin portal UI
- Utilization of Firebase database

Ideal Skills:
- Mobile app development for both Android & iOS
- Web portal UI development
- Firebase database integration

Note: This is a fixed-price project with a pre-set budget and a target completion timeframe.

YOU PROVIDE YOUR BID AND TIMEFRAME.