Retail Rescue Shift App

I want a straightforward mobile solution that lets boutique managers handle last-minute call-outs without headaches. The app must launch on both iOS and Android from day one and open straight into a clean flow where a manager can post an open shift, push it live, and then watch the responses roll in... (Budget: $10 - $30 USD, Jobs: Android, API Development, Backend Development, Database Management, Flutter, iOS Development, iPhone, JavaScript, Mobile App Development, React Native)