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CarPrint

FREE app tracks gas costs trip-by-trip

CarPrint records each drive through a BLE OBD2 adapter on your iPhone. See the route map, MPG, gas cost per trip, cost per mile, and driving scores. By default, trips stay on your device—no account required.

Download on the App Store View sample trips
CarPrint trip detail: route, fuel cost, MPG, CarPrint score, and trip stats.

Get started

You need:

Then:

Download on the App Store

More from the app

The green circles are hard accelerations. I was testing to calibrate what's considered a hard acceleration. More testing is needed.
CarPrint trip map with route, start and end markers, and hard acceleration markers.
This is a summary of my 38 trips.
CarPrint summary: roll-up fuel cost, MPG, CarPrint score, and aggregated driving stats.

How it works

Your iPhone pulls data from an OBD2 BLE adapter plugged into your vehicle’s OBD port usually under your steering wheel. After each drive you can see route maps and stats on miles traveled, MPG, gas cost, cost per mile and more.

Optional web dashboard: turn on upload to sync trips to getcarprint.com—see Getting started → Step 8 and the Intake form if you need a login token.

What you need

  • iPhone with CarPrint from the App Store — see Getting started
  • A supported OBD2 BLE adapter—for example OBDLink CX $80, Veepeak OBDCheck BLE $32, or Vgate iCar Pro $32—inserted in the vehicle’s OBD2 port
  • Gasoline or hybrid with OBD2 that connects reliably with your adapter so CarPrint can read trip data

Stuck? See Help for troubleshooting.

Vehicle compatibility

  • CarPrint is built for gasoline or hybrid vehicles with an OBD2 port (OBD-II); most U.S. light-duty vehicles from 1996 onward have one.
  • So far, CarPrint has been tested with 2023 and 2025 Subaru Crosstreks.
  • Compatibility can vary by make, model year, and hybrid systems.
  • Testing on other makes and models helps improve compatibility.

Ready to try CarPrint?

Download on the App Store Getting started

View sample trips (read-only demo)