Real-Time Event Map App

I'm looking for a skilled mobile app developer to create a real-time map application for a plein air outdoor art event. The app should be compatible with both iOS and Android platforms.

Essential Features:
- Real-time map synchronization
- Parking locations
- Painting setup locations
- Artist profiles with map sync
- Restroom locations
- Food vendors
- Security/help points
- Prizes and awards
- Calendar of upcoming events

Ideal Skills:
- Experience in mobile app development
- Proficiency in real-time data synchronization
- UI/UX design for intuitive navigation
- Familiarity with both iOS and Android platforms

Please include examples of similar projects in your bids.