GasTab — Trip-by-trip gas cost from OBD + receipt | OBD2 iPhone trip logger

Trip-by-trip gas cost from OBD fuel and your receipt

Show us another app that gives you trip-by-trip gas costs based on OBD fuel use and your last gas receipt.

GasTab is free. Trips stay on your iPhone by default. Log fill-ups on the web dashboard for receipt-based trip costs.

Download on the App Store View sample trips (read-only demo)

GasTab trip detail: addresses, gas cost, MPG, GasTab score, and trip stats.

Get started

You need:

iPhone with GasTab — Free on the App Store (iOS 26.2 or later)
A gasoline vehicle with an OBD2 port (U.S. light-duty from 1996 onward)
A BLE OBD2 adapter (~$32 / ~$80)

How it works

Record trips and your OBD adapter measures fuel used on each drive.
Log your gas receipts on the web dashboard.
The gas cost of each trip uses the price of gas on the last receipt.

Ready to try GasTab?

Download on the App Store Getting started