Pet Safety App Development, app already mostly created and ready to finish

I'm in need of a comprehensive mobile application that focuses on the safety of pets. The app will be available on both iOS and Android platforms.

Key Features:
- GPS Tracking: The app should facilitate real-time tracking of a pet's location for enhanced monitoring.
- Lost Pet Alerts: It should allow users to report a lost pet and send out alerts to other users within a designated radius.
- Vet Appointment Reminders: Users should be able to set up and receive reminders for their pet's vet appointments.
- Document and Pet Information Storage: The app should provide a secure means for users to store important pet-related documents and their pet's information.

Ideal candidates for this project should have:
- Proven experience in developing mobile applications for both iOS and Android.
- Proficiency in integrating GPS tracking functionalities.
- Prior experience implementing notification systems.
- Strong understanding of secure data storage and retrieval.

If you have a passion for pets and mobile app development, I would love to hear from you.