iOS App for Bluetooth-Triggered GPS Messages

I'm in need of an app, preferably designed for iOS, that will play a pre-recorded message via Bluetooth when a vehicle reaches a specific GPS location. The GPS locations and associated messages will be pre-set and uploaded via a spreadsheet within the app.

Key Features:
- iOS App Development: The app should be designed specifically for iOS devices.
- Bluetooth-Triggered Messages: The app should play a specific message via Bluetooth when the vehicle reaches a predetermined GPS location.
- GPS Integration: The app should have seamless GPS integration to accurately trigger the messages.
- Spreadsheet Uploading: Allow users to upload a spreadsheet containing GPS coordinates and the associated audio messages.
- User-Friendly Interface: The app should be easy to use and navigate, aimed at users with minimal technical experience.
- Testing: Ensure the app is thoroughly tested, particularly its GPS triggering functionality.

Ideal Skills:
- iOS App Development
- Bluetooth Connectivity
- GPS Integration
- Spreadsheet Uploading Feature
- User Interface Design
- Thorough Testing
- Previous experience with road racing or similar events would be a plus.

I'm looking for a Texas-based freelancer for this project. Please provide your proposal with an estimated timeline and budget.