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Efficiency (free)

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Efficiency is a powerful trip computer for OBD2 enabled vehicles that is focused on helping you maximize your fuel economy.

Please report any problems you may encounter. Make sure to include your car model, year, OBD2 adapter, phone model, and Android version you're using.

App Requirements:
- A OBD2 enabled vehicle built in 1996 or newer
- ELM327 Bluetooth Adapter
- An Android 2.1 phone/device or newer with Bluetooth capabilities.

For Help visit or  email to  

Tags: Efficiency, OBD2, OBDII, Elm327, Ecu, MPG, fuel economy, fuel efficiency, Eco meter, ecometer, econmeter, green meter, ECU, car, truck, speed, rpm, gas, OBD, OBD-II.

iPhone related for Efficiency (free)

Efficiency (free) was developed for Android by Nubbu Apps

Package name :

System permissions : 3 Click here to show/hide list
  • android.permission.BLUETOOTH_ADMIN
  • android.permission.BLUETOOTH
  • android.permission.WAKE_LOCK

I am the developer of this Application !

Screenshot(s) available for Efficiency (free)

Discussion(s) about Efficiency (free) in our forum

Comments and Ratings for Efficiency (free)

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by A Google User the 2/5/2013

mpg does not change to l/100km can not change from mpg to l/100km. not very useful in europe...

by A Google User the 1/2/2013

Locks up after 5 seconds of perfection This app is perfect since I really only care about MPG. Torque and some other paid apps are inaccurate and/or cluttered. However, like others, this app stops updating after 5 to 10 seconds.

by A Google User the 12/29/2012

Wrong! Looks nice, gets data from car... But the numbers are all wrong. Example. Etc shows temp 100 when torque and others show 160. Can't explain that as f vs celsius, it's wrong either way... So The mpg values are also highly suspect.... Was this thing tested?

by A Google User the 12/20/2012

I want to love it The interface is fantastic, much better than Torque. Unfortunately like others, it seems to freeze up after a few minutes use, only to intermittently update before freezing again.

by A Google User the 12/8/2012

What a piece of garbage Dammed thing never even connected to my odb2 device, but had no issues with Torque.

by A Google User the 11/21/2012

doesn't work..

by A Google User the 10/9/2012

2002 F350 7.3... Doesn't work. Elm327. Torque works fine.

by A Google User the 8/26/2012

Wife loves it. So me and my wife use this app for our mustangs, I have a v8 model so she makes me use this. It was a wake up call to see how my driving yields horrid mpg. Great app

by A Google User the 8/23/2012

Works for 5 seconds then locks up Elm 327, EpicTouch ICS, 2008 gmc sierra. contacted developer, no response. I would buy this app if it worked.

by A Google User the 7/30/2012

Change mpg to kpl Chosed metric units do not shown on main interface. Keeps reading MPG. Has to be changed.

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Efficiency (free) for Android was rated by Android Market Users on : 2.4/5


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