make me an app similar to greetings island

I am looking for a skilled developer who can create a mobile app for both iOS and Android platforms. The app should have the following key features:

- Customizable templates: Users should be able to choose from a variety of templates and customize them according to their preferences.
- Invitation sending feature: The app should allow users to send invitations to their friends and family through email or other social media platforms.
- Integration with social media: Users should be able to share their customized invitations on social media platforms like Facebook, Instagram, etc.

In terms of design, I want the app to be similar to Greetings Island. The design should be visually appealing and user-friendly.

Skills and experience required for this project:
- Proficiency in mobile app development for both iOS and Android platforms
- Experience in developing apps with customizable templates and social media integration
- Familiarity with design principles and ability to create visually appealing interfaces

If you have the required skills and experience, please submit your proposal along with examples of your previous work.