Mobile App UX for Engagement

I have a mobile app that needs a sharp, data-driven UX overhaul aimed squarely at boosting user engagement. The core success signal I care about is how long people stay active in the app—time-on-app must rise noticeably after your work goes live... (Budget: ₹600 - ₹1500 INR, Jobs: Figma, Graphic Design, Interaction Design, Mobile App Development, Prototyping, User Interface / IA, User Research, UX / User Experience)