# Spool Ethanol Analyzer vs e85Cal

The clearest difference is review sentiment: e85Cal at 83% against Spool Ethanol Analyzer's 40%. e85Cal also leads on rating (4.7 vs 4.1) and update cadence (every 4 months vs every 13 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

e85Cal holds the better App Store score, 4.7 against 4.1. Both are backed by a comparable volume of ratings — 14 and 35 respectively. Written reviews point the same way: 40% of Spool Ethanol Analyzer's written reviews are positive against 83% of e85Cal's.

Spool Ethanol Analyzer ships an update every 13 months, e85Cal every 4 months. The most recent releases landed on June 9, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Spool Ethanol Analyzer | e85Cal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (14 ratings)](https://appshunter.io/ios/app/spool-ethanol-analyzer/id1418992096/reviews) | **[4.7 (35 ratings)](https://appshunter.io/ios/app/e85cal/id1470313135/reviews)** |
| Number of ratings | 14 | **35** |
| Positive reviews | 40.0% of reviews | **83.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 4 months** |
| Monetization | Free | Free |
| Size | 9 MB | 15 MB |
| Requires iOS | **11.0** | 12.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ajay Rajeev](https://appshunter.io/developer/1418992095) | [Michael Joe](https://appshunter.io/developer/1132486512) |

## What reviewers say

### Spool Ethanol Analyzer

[App page](https://appshunter.io/ios/app/spool-ethanol-analyzer/id1418992096)

This application connects to a wireless sensor kit to measure in-tank ethanol content and fuel temperature. It also features a mixing ratio calculator that can be used independently of the sensor hardware.

**Highlights:** Connects to Spool Wireless Ethanol Sensor Kit, Measures in-tank ethanol content, Measures fuel temperature, Includes mixing ratio calculator, Uses Low energy Bluetooth protocols, Fast and reliable data

**Features:** macOS Compatibility

**In-app purchases:** none


### e85Cal

[App page](https://appshunter.io/ios/app/e85cal/id1470313135)

This app assists users in calculating the precise amounts of standard and ethanol gasoline needed to achieve a desired ethanol percentage in their fuel mix. It simplifies the process by taking into account tank size, current fuel level, and the ethanol content of available fuel types.

**Highlights:** Calculate ethanol percentage goal, Enter gas tank size, Input standard pump gas ethanol %, Input ethanol pump gas ethanol %, Set target ethanol % mix, Enter current fuel level %

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Spool Ethanol Analyzer free?

Spool Ethanol Analyzer is free to download, with no in-app purchases.

### Is e85Cal free?

e85Cal is free to download, with no in-app purchases.

### Which has better reviews, Spool Ethanol Analyzer or e85Cal?

e85Cal is rated higher. Spool Ethanol Analyzer averages 4.1 out of 5 from 14 ratings, while e85Cal averages 4.7 from 35 ratings.

### Do Spool Ethanol Analyzer or e85Cal have ads?

Neither Spool Ethanol Analyzer nor e85Cal shows ads.

### Which is updated more often, Spool Ethanol Analyzer or e85Cal?

Spool Ethanol Analyzer ships an update every 13 months, and e85Cal every 4 months. Most recently, Spool Ethanol Analyzer was updated on June 9, 2026 and e85Cal on September 26, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*