RF engineer needed – review GPS tracker scan data (remote, small job)

Small remote job for someone with hands-on RF experience. My client thinks there may be a GPS tracker hidden in his car. I need someone to help with the technical side: 1. Recommend a Bluetooth scan app (iPhone or Android) and an RF detector or spectrum analyzer setup... (Budget: ₹600 - ₹1500 INR, Jobs: Android, Bluetooth, Electrical Engineering, GPS, Mobile App Development, Signal Processing, Telecommunications Engineering, Wireless)