13 must-have car gadgets that cost less than $100

Smart car adapter

Automatic

Automatic is a small car adapter that you plug into the onboard diagnostics port of your car to get all kinds of data about your vehicle.

The device — which pairs with your phone via Bluetooth — diagnoses engine problems, remembers where you parked, displays your trip history, and can even call for help in the case of an accident.

There’s even an Automatic app gallery, which features apps for business, convenience and savings, and safety. For example, the Concur app lets drivers track mileage for work trips, making expenses easy.

You can also connect the device to your Amazon Echo so that you can do things like ask Alexa how much fuel you have or how much you drove last week.

The device, which works with most cars that were built since 1996, is available on Amazon for $66.40.