GPS Spoofing Protection for AR App

We are developing an innovative Location-Based AR Social Platform. The app features a monetization/ad model called (Aura Cash), where advertisers drop real financial rewards (Auras) at specific geographic coordinates (e.g., coffee shops, retail stores)... (Budget: $250 - $750 USD, Jobs: Android, API Development, Backend Development, GPS, iPhone, Mobile App Development, Software Architecture, Software Development)