Event Planning App Development

I'm looking to create a cross-platform application for Android, iOS, and web, dedicated to planning events parties. The app will include:

- Vendor and Admin Panels (details needed)
- Event Planning Tools
- Item Booking
- Gift Sending Feature

The project must be completed within one week.

Ideal Skills:
- Experience in cross-platform app development
- Proficiency in building vendor and admin panels
- Strong background in UI/UX design
- Knowledge of backend development for inventory and booking management

Please provide a portfolio showcasing similar work.