Fitness App UI Revamp

I'm looking for an experienced UI designer to modernize the look and feel of my fitness app across iOS, Android, and Web platforms. The current UI needs a complete overhaul in the following areas:

- Navigation: Simplify and enhance usability
- Typography: Update fonts for better readability and aesthetics
- Color Scheme: Refresh colors to create a more modern and appealing palette

Ideal Skills and Experience:
- Proven experience in UI design for mobile and web applications
- Strong portfolio showcasing modern design transformations
- Expertise in user interface design principles and trends
- Ability to work collaboratively and incorporate feedback

Please provide samples of previous work and a brief outline of your approach. Looking forward to your proposals!