Engaging UX for Mobile & Web

I need a seasoned UX designer to help me rethink both my mobile app and its companion website with one clear objective in mind—dramatically increasing user engagement. The core flows are already in place, but interactions feel flat and users drop off after a few screens... (Budget: $250 - $750 USD, Jobs: Figma, Graphic Design, Interaction Design, Mobile App Development, Prototyping, User Interface / IA, User Research, Website Design)