Wellness Center Desktop Software Development

I need a desktop application for my wellness center, focusing on Windows compatibility.

Core Functions:
- Appointment Scheduling: System to manage client appointments efficiently.
- Customer Management: Database and interface for tracking customer details and history.
- Billing and Payments: Integrated system for processing payments.

Ideal Skills and Experience:
- Proficiency in Windows desktop application development.
- Experience in creating software for health or wellness centers is a plus.
- Strong knowledge in customer management and billing software integration.
- Excellent understanding of user-friendly interface design.