Comprehensive App Upgrade for iOS & Android

I'm looking forward to upgrading my current application to run seamlessly on both iOS and Android systems. As of now, specifics about the expected improvements haven't been established, however a broad vision towards enhancing the user experience is our foremost aim. Potential freelancers with expertise in mobile application development and cross-platform compatibility are strongly preferred. There is no fixed time limit for this project, indicating the importance of quality over quickness. The project execution timeline can be planned as per mutual understanding and convenience.

Key Requirements:
- Experience in developing and upgrading apps for iOS and Android.
- Demonstrated understanding of user experience enhancement.
- Capability to pinpoint areas of potential improvement in the app.
- Willingness to collaborate on an open timeline.