# NEFcon vs Ethanol Calculator

The clearest difference is price: NEFcon at Free against Ethanol Calculator's $9.99. NEFcon also leads on iOS requirement (11.0 vs 16.0). Ethanol Calculator's advantage is update cadence (every 2 days vs every 3 weeks). On ads, in-app purchases and device support there is nothing between them.

NEFcon is free to download; Ethanol Calculator costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

NEFcon ships an update every 3 weeks, Ethanol Calculator every 2 days. The most recent releases landed on September 24, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | NEFcon | Ethanol Calculator |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Size | 23 MB | 9 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Murat Ercan](https://appshunter.io/developer/1473700448) | [Mursel OSMANOGLU](https://appshunter.io/developer/1869685490) |

## What reviewers say

### NEFcon

[App page](https://appshunter.io/ios/app/nefcon/id1473700449)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ethanol Calculator

[App page](https://appshunter.io/ios/app/ethanol-calculator-e85-fuel/id6757930343)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is NEFcon free?

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

### Is Ethanol Calculator free?

Ethanol Calculator costs $9.99, with no in-app purchases.

### Do NEFcon or Ethanol Calculator have ads?

Neither NEFcon nor Ethanol Calculator shows ads.

### Which is updated more often, NEFcon or Ethanol Calculator?

NEFcon ships an update every 3 weeks, and Ethanol Calculator every 2 days. Most recently, NEFcon was updated on September 24, 2026 and Ethanol Calculator on October 7, 2026.

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