# eFuelConverter vs AviCalc

The clearest difference is price: AviCalc at Free against eFuelConverter's $0.99. AviCalc also leads on update cadence (every 3 weeks vs every 15 months). eFuelConverter's advantage is iOS requirement (8.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

AviCalc is free to download; eFuelConverter costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

eFuelConverter ships an update every 15 months, AviCalc every 3 weeks. The most recent releases landed on September 21, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | eFuelConverter | AviCalc |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 3 weeks** |
| Monetization | Paid | — |
| Size | 1 MB | 9 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [PH-Informatik](https://appshunter.io/developer/595299933) | [Aldo Mendes Martins](https://appshunter.io/developer/377344895) |

## What reviewers say

### eFuelConverter

[App page](https://appshunter.io/ios/app/efuelconverter/id612362193)

This app calculates and converts aviation fuel quantities for JetA1 and AvGAS. It uses specific conversion factors for each fuel type to ensure accurate measurements.

**Highlights:** JetA1 fuel conversion, AvGAS fuel conversion, Customizable conversion factors, Supports lbs/ltr measurements

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

**In-app purchases:** none


### AviCalc

[App page](https://appshunter.io/ios/app/avicalc/id6474237308)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is eFuelConverter free?

eFuelConverter costs $0.99, with no in-app purchases.

### Is AviCalc free?

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

### Do eFuelConverter or AviCalc have ads?

Neither eFuelConverter nor AviCalc shows ads.

### Which is updated more often, eFuelConverter or AviCalc?

eFuelConverter ships an update every 15 months, and AviCalc every 3 weeks. Most recently, eFuelConverter was updated on September 21, 2026 and AviCalc on September 19, 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.*