Use Case Diagram for Mobile App

I'm looking for an expert who can create a use case diagram for a mobile application. The diagram should focus on user interactions, specifically from the perspective of the primary users, who in this case are customers.

Ideal Skills:
- Expertise in creating UML diagrams, specifically use case diagrams.
- Strong understanding of mobile application user interactions.
- Experience with customer-focused mobile app design.

Please provide examples of similar projects you have completed.