Multi-Platform Sports Tracking App Development

I am seeking a skilled app developer to create a sports tracking application for both Android and iOS, with a focus on tennis. The primary functionality of the app will be to monitor and log various aspects of tennis activity.

Key Features:
- Multi-platform compatibility (Android and iOS).
- Activity tracking focused on tennis.
- API support for future integrations.

Ideal candidates should have:
- Proven experience in mobile app development, particularly for Android and iOS.
- Prior work with sports or activity tracking applications.
- Strong understanding of API integration.
- Experience or knowledge in tennis would be a plus.