Cross-Platform QR Scanning Mobile App

I'm looking for a mobile application that can scan custom QR codes specific to my business. The app should be compatible with both iOS and Android platforms. It will need to notify users with both push and in-app notifications.

Key Features:
- QR Code Scanning: The app should be able to scan custom QR codes specific to my business.
- Location Tracking: The app should have a feature for location tracking.
- Templates: The app should be able to use templates.
- Cross-Platform: The app should be compatible with both iOS and Android.
- Notifications: The app should send push and in-app notifications.

Ideal Skills and Experience:
- Cross-Platform Mobile App Development
- QR Code Scanning Implementation
- Location Tracking Integration
- Custom Template Creation
- Push and In-app Notification Systems
- iOS and Android Development Experience

Please share your previous work examples that are relevant to this project.