Flutter physical exercise app evolution

I am looking for a freelancer to help me evolve my Flutter physical exercise app. Here are the details of the project:

Features to add or improve:
- Add exit button
- Correct languages issues
- Show errors coming from back
- Better ux

Timeline:
- I am flexible with the timeline, so we can discuss and agree on a suitable timeframe for the project.

Experience level required:
- Intermediate level of experience is preferred for this project.

If you have the skills and experience in Flutter development and are interested in working on this project, please reach out to me. Thank you!