Construction Site Management App

I need a cross-platform mobile application that works seamlessly on both Android and iPhone to keep every aspect of our construction sites in one place. Four clear user roles must be built in—Admin, Manager, Employee and Site Incharge—so each person only sees the tools and data relevant to them... (Budget: ₹50000 - ₹100000 INR, Jobs: Android, Database Management, Flutter, iOS, iPhone, Mobile App Development, PHP, React Native)