Cross-Platform Location History

I need a straightforward service that quietly records where a phone has been and lets me pull that history back on demand. The same core codebase—or two lightweight wrappers around a shared API—has to run on both iOS and Android so the behaviour is identical no matter the handset... (Budget: $750 - $1500 USD, Jobs: Android, GraphQL, iOS, iPad, iPhone, Mobile App Development, REST API, SQLite)