iPad Automation App Development

I need a custom iPad application that integrates with Jobber, FreshBooks, and Trello to streamline my workflow.

Requirements:
- Users can sign work orders via Jobber.
- Automatically fill in the following on FreshBooks:
- Client details
- Work order details
- Billing information
- Automatically populate Trello with:
- Client details
- Work order notes
- Task assignments
- Photos
- Essential features:
- User authentication
- Offline functionality
- Real-time data sync

Ideal skills and experience:
- Experience in mobile app development, particularly for iOS
- Strong background in integrating different software platforms
- Knowledge of user authentication and data synchronization techniques
- Familiarity with Jobber, FreshBooks, and Trello would be a plus