Minimalist Mobile App UI/UX

I’m kicking off a mobile-first product and need a polished, modern interface for both iOS and Android. The look I have in mind is clean, minimalist and highly focused on user experience—think the clarity and smooth flow you find in Spotify... (Budget: $250 - $750 USD, Jobs: Adobe XD, Android, Figma, Graphic Design, Mobile App Development, UI / User Interface, User Interface / IA, UX / User Experience)