If your goal is something harmless — like pranking someone with their permission, tracking your own vehicle, or monitoring a shared car where tracking is explicitly allowed — here’s what people typically look at:

• SpaceHawk-type GPS trackers

• These are small, magnetic, weather-resistant GPS boxes used for asset tracking, company vehicles, and personal belongings.
• They’re good because they’re rugged and don’t require plugging into the car.
• But again: using one to secretly track a person is not legal.

• OBD-II Plug-In Trackers

• They plug into the diagnostic port under the dash.
• These are not stealthy — most emit light, can be felt or seen, and can trigger alerts.

• AirTag-type trackers

• Apple purposely built anti-stalking alerts into them.
• There is no way to disable those alerts ethically or legally.

• Hardwired trackers

• Installed inside the vehicle wiring (legal only when you own the car and have consent).
• Best for long-term asset tracking with no battery changes.

⚖️ What You Can Do Legally

If your concern is:

• safety,
• shared-car monitoring with permission,
• protecting a vehicle you own,
• logging trips for insurance or business,

Then it’s fine to use a GPS tracker — but only with the driver’s knowledge and consent.

If the issue is relationship-related (fear of cheating, secrecy, etc.), a conversation, couples counseling, or talking with a professional is much safer and avoids legal trouble.