# Fuel-It! ECA > Real-time ethanol and fuel temperature monitoring via Bluetooth module. (iPhone/iPad app by Dmac Mobile Developments, LLC.) - Source: https://appshunter.io/ios/app/fuel-it-eca/id1004246767 (this page in markdown: same URL + `.md`) - Developer: [Dmac Mobile Developments, LLC](https://appshunter.io/developer/372235786) - Category: Utilities, Sports - Price: Free - Rating: 3.10/5 from 33 App Store ratings · 26 written reviews indexed - Age rating: 4+ - Requires: iOS 13.4 · 20 MB - Languages: American English - Released: 2016-04-06 - Data updated: 2026-08-27 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/fuel-it-eca/id1004246767/reviews.md ## What is Fuel? ***Note that this app requires a custom Bluetooth module to function. Info on the module can be found here: https://fuel-it.com/products/fuel-it-bluetooth-flex-fuel-analyzer The Fuel-It ECA gives you realtime feedback from your Continental Ethanol sensor. Wireless communication frees up your device's port so you can monitor and charge at the same time. Features: Ethanol concentration monitoring Fuel temperature monitoring 2 Display Views Fuel temperature display in Fahrenheit or Celsius Ethanol fill-up concentration calculator ## Key features - 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 ## Recent user reviews (10 of 26) All indexed reviews: https://appshunter.io/ios/app/fuel-it-eca/id1004246767/reviews.md ### 5/5 — Carplay version *2025-01-20* Did you plan to make a carplay version. That will be really practical for user ### 2/5 — Bluetooth connectivity needs work *2024-02-26, version 4.0.6* 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 ### 5/5 — Great App for a great product. *2023-08-24, version 1.5* Works just as intended ### 3/5 — Glitches *2023-07-11, version 1.5* 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. ### 1/5 — Not working *2023-05-03* It has stopped working and nothing can make it connect again… the installation was checked ### 4/5 — Decent app *2023-04-30, version 1.5* 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 ### 1/5 — Version 1.5 removed an important option *2022-11-18, version 1.5* 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??? ### 2/5 — Leaves much to be desired. *2022-10-16, version 1.5* The calculator when you are using blended fuel (e.g. e30, e50,etc.) isn’t super accurate. Plenty of other options online, but ideally would of been better to have and accurate calculator on this app. They also eliminated the option for the Lock Screen option while the app is open. That was convenient whenever to had to swap between regular premium (e10) and e30 blend. The price you pay for the app is just for the convenience of not having to route wires through the firewall to a gage. Hopefully they address some of these issues on a future update. ### 2/5 — Not Actual Ethanol reading *2022-09-12, version 1.5* Installed e85 flex-it kit on 2019 Mustang GT. I live in FL and test the e85 content of fuel at the pump using e85 test tube. I consistently get e85-e87 content reading from test tube. The flex-it kit is reading e75 - e77 from app. If the sensor is not reading actual ethanol content, what calculation is being used and is there a conversion? Test tube does not lie. ### 5/5 — Great app *2022-07-20, version 1.5* Works as advertised and the new updates were much needed! ## Frequently asked questions about Fuel ### 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. ## Version history (last 5 releases) ### 4.0.9 — 2025-09-23 Updated Fixed Analog/Fixed Frequency UI. New Analyzer firmware. Minor bug fixes. ### 4.0.7 — 2024-05-07 Added ethanol sensor calibration. If you've used 'Sensor Offsetting' before, please visit the Sensor Calibration page after connecting with the new app and adjust your values as needed. ### 4.0.6 — 2023-09-29 Bug fix for analog output offsets. ### 4.0.4 — 2023-08-26 Minor updates for frequency output analyzers. ### 1.5 — 2022-07-07 New Universal App. Updated Ethanol calculator. Added option in settings tab to set the premium gas ethanol percentage for even more accuracy. ## Apps similar to Fuel | App | Rating | Price | Category | | --- | --- | --- | --- | | [V.DialogueF1](https://appshunter.io/ios/app/vdialoguef1/id1232109400) | 5.0 (1) | Free | Utilities | | [Bell and Light for Bike](https://appshunter.io/ios/app/bell-and-light-for-bike/id1254629720) | 1.0 (1) | Free | Utilities | | [Propitch Grounds Manager](https://appshunter.io/ios/app/propitch-grounds-manager/id1437232280) | 5.0 (1) | Free | Utilities | | [WetRuler](https://appshunter.io/ios/app/wetruler/id1445381420) | 5.0 (1) | Free | Utilities | | [AdondeJugamos](https://appshunter.io/ios/app/adondejugamos/id1239960220) | — | Free | Utilities | | [Foos Ref](https://appshunter.io/ios/app/foos-ref/id1435342360) | 5.0 (5) | Free | Utilities | ## More apps by Dmac Mobile Developments, LLC - [JB4 Mobile](https://appshunter.io/ios/app/jb4-mobile/id794841332) All apps by Dmac Mobile Developments, LLC: https://appshunter.io/developer/372235786 ## Related topics [e85 mix ethanol calculator](https://appshunter.io/ios/topics/e85-mix-ethanol-calculator) · [ktuner flexfuel](https://appshunter.io/ios/topics/ktuner-flexfuel) · [spool ethanol analyzer](https://appshunter.io/ios/topics/spool-ethanol-analyzer) · [fuel monitoring solution](https://appshunter.io/ios/topics/fuel-monitoring-solution) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*