Spool Ethanol Analyzer is designed to connect to the Spool Wireless Ethanol Sensor Kit and/or the Spool Handheld ethanol analyzer to help determine the in-tank/pump ethanol content and fuel temperature. It incorporates the latest Low energy Bluetooth protocols and provides fast and reliable ethanol content information right on your smartphone.

The App also includes a mixing ratio calculator and it can be used even if you don't have access to the Spool Wireless Ethanol Sensor Kit.

The Spool Wireless Ethanol Sensor Kit can be purchased at

What’s New

Version 1.6

Included support for our newly released handheld wireless ethanol content analyzer.
Included tank size as a customizable option for mix calculator. The selected tank size would be saved between sessions until user selects a new tank size.
Updated Layout changes for newer devices
Minor Bug Fixes

Ratings and Reviews

4.3 out of 5
11 Ratings

11 Ratings

jDangE92 ,


This is my favorite application to use for creating mixes while filling up at the pump.

Mista_Aye95 ,

Please allow adjustable fuel tank size!!

I'm sure this would be an easy update, email your developer and ask him/her to add this option! If there is no update then I will be forced to go with other competitors offerings.

248love ,

The best

The analyzer and the app are flawless +1yr in. Was far more affordable than FueliT

App Privacy

The developer, Ajay Rajeev, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

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


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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