# Fuel Density Calculation vs 777Buddy

The clearest difference is price: 777Buddy at Free against Fuel Density Calculation's $2.99. 777Buddy also leads on iOS requirement (15.0 vs 17.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

777Buddy is free to download; Fuel Density Calculation costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Fuel Density Calculation ships an update every 2 months, 777Buddy every 6 weeks. The most recent releases landed on August 22, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Fuel Density Calculation | 777Buddy |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/fuel-density-calculation/id6636469810/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Paid | — |
| Size | 1 MB | 47 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Richard Montoya](https://appshunter.io/developer/1762752434) | [Robert Steeneck](https://appshunter.io/developer/349049528) |

## What reviewers say

### Fuel Density Calculation

[App page](https://appshunter.io/ios/app/fuel-density-calculation/id6636469810)

This utility app assists wide-body aircrews, specifically for Boeing and Airbus aircraft, in comparing uploaded fuel quantities with actual fuel on board. It incorporates density calculations for accurate fuel management.

**Highlights:** Fuel density calculations, Compare uploaded vs. actual fuel, Designed for Boeing and Airbus aircrews, Accurate fuel on board (FOB) verification

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

**In-app purchases:** none


### 777Buddy

[App page](https://appshunter.io/ios/app/777buddy/id6737528946)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fuel Density Calculation free?

Fuel Density Calculation costs $2.99, with no in-app purchases.

### Is 777Buddy free?

777Buddy is free to download, with no in-app purchases.

### Do Fuel Density Calculation or 777Buddy have ads?

Neither Fuel Density Calculation nor 777Buddy shows ads.

### Which is updated more often, Fuel Density Calculation or 777Buddy?

Fuel Density Calculation ships an update every 2 months, and 777Buddy every 6 weeks. Most recently, Fuel Density Calculation was updated on August 22, 2026 and 777Buddy on September 17, 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.*