A popular Android app began secretly spying on its users months after it was listed on Google Play | TechCrunch
Amazon.com: Spy Spot OBD 2 Real Time 4G LTE GPS Tracker for Cars and Trucks - Hidden Locator Tracking Device with SIM Card Included - Black - US Coverage Available - Subscription Required : Electronics
2-Pack) - Spy Tec STI_GL300 Mini Portable Real Time GPS Tracker, Pack of 2 : Amazon.com.au: Electronics
Real Time GPS Tracking Device Spy Surveillance Tool Fits in Briefcase - Walmart.com
10 Best Free Spy Apps for Android (Undetectable, Hidden & No Root) | Discover Magazine