Android App Development for Service Tracking

I'm looking for an experienced Android app developer to create a service delivery tracking app for my firm. The app should focus primarily on real-time tracking of our service deliveries.

Key Features:
- Real-time tracking: The primary function of the app is to allow users to track service deliveries in real-time.

Ideal Skills and Experience:
- Proficient in Android app development
- Previous experience in developing service tracking apps
- Strong understanding of real-time tracking technology

Please provide examples of similar apps you've developed in your proposal.