Web App to Mobile App Conversion

I need a developer to turn my web application into a mobile app for both iOS and Android platforms. The app must include push notifications and support in-app purchases.

Key Requirements:
- Convert existing web app (made by Replit) to mobile app
- Implement push notifications (service to be decided)
- Include in-app purchases
- Ensure app is compatible with both iOS and Android

Ideal Skills and Experience:
- Experience with mobile app development for iOS and Android
- Familiarity with implementing push notifications
- Knowledge of in-app purchase integration
- Strong background in app conversion from web to mobile

Please provide examples of similar work done, and your approach to this project.