Free

Details

  • Released
  • Updated
  • April 6, 2016
  • September 23, 2025

Features

Fuel-It! ECA screenshot #1 for iPhone
Fuel-It! ECA screenshot #2 for iPhone
Fuel-It! ECA screenshot #3 for iPhone
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About

Monitor your vehicle's ethanol concentration and fuel temperature in real-time. This app wirelessly connects to a compatible Bluetooth module, freeing up your device's port for simultaneous charging and monitoring. It includes an ethanol fill-up concentration calculator and customizable display views.

Real-time ethanol concentration monitoring
Real-time fuel temperature monitoring
Wireless Bluetooth connectivity
Ethanol fill-up concentration calculator
Fahrenheit or Celsius display options
Two display views
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What's New in Fuel

4.0.9

September 23, 2025

Updated Fixed Analog/Fixed Frequency UI. New Analyzer firmware. Minor bug fixes.

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User reviews

Bluetooth connectivity needs work

This app looks decent from a GUI perspective however, connecting to the bluetooth module takes several attempts to connect and sometimes even forces the app to close. Not sure if it’s a frequency issue or the app. Regardless, there are no ways to change what channel the module can be on in order to possibly fix the connectivity problem. I hope this is fixed with newer versions but until then I have to give this 2 stars
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Great App for a great product.

Works just as intended

Glitches

I’m pretty familiar with what my car needs when it’s low, it’s almost always the same amount of e85 and 93 to get a full tank. Sometimes the calculator glitches or is just incorrect and I have to restart app several times for it to act normal.

Decent app

Sliders a bit difficult to get correct. Also perhaps a bug. I've gotten mix values that were way off on the calculation page. I have the sensor installed so it reads the current mix. Turns out I have to zero that slider and manually set the current mix to get the rest of the values to calculate correctly. Should be an easy fix
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Version 1.5 removed an important option

You used to be able to set the app to “allow to keep screen on” so that you could bring up the app and use it like a gauge and the screen on your phone would never turn off. This was helpful when mixing content or waiting for the fuel content to update. Now I have to keep waking up my phone screen. Very annoying. Can we have this option back please???
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Developer apps

FAQ

What does the Fuel-It! ECA app do?

The Fuel-It! ECA app provides real-time feedback on your vehicle's ethanol concentration and fuel temperature. It connects wirelessly to a compatible Bluetooth module, allowing you to monitor these metrics without occupying your device's port.

What are the key features of the Fuel-It! ECA app?

Key features include real-time ethanol concentration monitoring, real-time fuel temperature monitoring, an ethanol fill-up concentration calculator, and two display views. You can also choose to display fuel temperature in either Fahrenheit or Celsius.

How do I use the Fuel-It! ECA app?

To use the app, you will need a custom Bluetooth module that connects to your vehicle's Continental Ethanol sensor. Once the module is installed and paired with your device, the app will display the real-time fuel data wirelessly.

Is the Fuel-It! ECA app compatible with all devices?

The app requires a custom Bluetooth module to function, which is sold separately. While the app itself is likely compatible with most modern smartphones that support Bluetooth, the primary requirement is the specific hardware module.

What is the cost of the Fuel-It! ECA app?

The Fuel-It! ECA app is free to download and use. However, it requires the purchase of a specific Fuel-It! Bluetooth Flex Fuel Analyzer module to operate, which is available on their website.