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Calculate your car’s fuel consumption.

Easy to use, the HonestJohn.co.uk Real MPG app calculates how your car is performing, and rates your Real MPG against its official stated figure and other owners of the same model.

Ever get the feeling that your car’s fuel consumption isn’t living up to expectations?

The HonestJohn.co.uk Real MPG app allows you to:

- Store your fill-up details, or your trip computer reading to track your fuel economy over time
- Compare your MPG to other owners’ averages
- Try to beat the Real MPG national average
- Store multiple cars and view your history and statistics for each model
- Share your results on Facebook and challenge your friends to beat your average

What is Real MPG?

Real MPG is a real world fuel economy register with more than 100,000 MPG submissions from HonestJohn.co.uk readers. Unlike official fuel consumption figures, Real MPG uses real life comparative data to show car owners and buyers how much on-the-road fuel a vehicle uses, enabling them to make accurate predictions as to how much fuel they will use and be better prepared as to how much that will cost. Find out more at HonestJohn.co.uk/RealMPG

What is HonestJohn.co.uk?

HonestJohn.co.uk is an award-winning website offering unbiased advice for owners, buyers and sellers, including more than 3600 reviews, the latest news, the best deals, our unique Car Chooser tool, and much more.

What’s New

Version 1.1

This app has been updated by Apple to use the latest Apple signing certificate.

Minor bug fixes

Ratings and Reviews

1.5 out of 5
12 Ratings

12 Ratings

Disgruntled of Mid Wales ,

Was OK now U/S

Started using this app a few months ago, and stopped recording my fuel anywhere else, once is seemed reliable. Unfortunately a few weeks ago, when you enter refuel info and press Confirm, it says "Sending MPG Log", then takes you back to Confirm screen, with no data saved. :-(

Dominic Thomas ,

Seems to have broken

Worked fine for a few months, but recently it stopped being able to update a new fuel purchase, and having logged out it won't even let me log in again. Useless app as it stands now.

chr0m4t1c ,


The app insistst you sign up in order to submit your data, so I filled in a fake name, fake email, fake postcode and left the insurance information blank.

If you can't provide me a reason for collecting the data, you can't have real data, "Honest" John.

You're not having my location either, not unless you tell me that you're not sending it anywhere.

1/10 for thinking about your user's privacy, guys.

App Privacy

The developer, HonestJohn, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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