# Spool Ethanol Analyzer — user reviews

> 10 indexed App Store user reviews of Spool Ethanol Analyzer by Ajay Rajeev, rated 4.14/5 from 14 ratings.

- Source: https://appshunter.io/ios/app/spool-ethanol-analyzer/id1418992096/reviews
- App overview in markdown: https://appshunter.io/ios/app/spool-ethanol-analyzer/id1418992096.md
- Rating breakdown: 5★ 9 · 4★ 1 · 3★ 1 · 2★ 3 · 1★ 0

## Most critical reviews (10 lowest-rated)

### 1/5 — Gallons?

*2020-06-20*

Literally only the USA uses gallons. If this company is serious about selling their product have an option for Litres calculation. 7 billion people use Litres, 400 million use gallons.

### 2/5 — Calculator is no good.

*2022-03-20*

The calculator is nowhere near precise enough as it should be. It should not round gallons needed to the nearest whole gallon. Fuel tank size should be adjustable by 0.5 gal instead of 1 gallon. Same thing with all the estimated ethanol grades. Should be by 1% and not 5%.

### 2/5 — Please allow adjustable fuel tank size!!

*2020-03-12*

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.

### 2/5 — Please make the fuel level adjustable! Thanks!

*2019-01-16*

Works but need to make the fuel level gallons adjustable! Thanks!

### 3/5 — Metric needed

*2024-10-26*

I live in canada and the pumps are in litres and the app is only in gallons so i have to do the conversion all the time when filling up.  Please add a metric option. Otherwise works fine.

### 3/5 — Calculator works, but only for 16-gallon tanks

*2018-12-15*

Please allow configuration of fuel tank capacity.

### 5/5 — The best

*2020-09-05*

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

### 5/5 — Amazing!!

*2020-04-11*

The best app for e85!!

### 5/5 — Great way to estimate ethanol amounts

*2020-02-06*

Pro:

This is a great app that allows you to calculate how much ethanol you need when running a mixed fuel tune for example e50!! Wonderful app!!

Con: 

only works for one size fuel tank.

### 5/5 — Perfect

*2019-06-29*

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

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*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 2026-06-09.*