Cross-Platform Masjid Finder App

I need a clean, reliable mobile app that lets users open their phone, tap once, and instantly see the nearest Masjid on a map. The build has to ship for both iOS and Android from the same code-base, so... (Budget: ₹600 - ₹1500 INR, Jobs: Android, API Integration, Flutter, Geolocation, GPS, iOS Development, Mobile App Development)