E vs Fuel Density Calculation
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
E
Access all your E-FORCE SLi battery rescue tools in one place. This application from GENESIS RESCUE SYSTEMS provides essential functionalities for managing and utilizing your rescue equipment.
- Battery rescue tool access
- E-FORCE SLi system management
- GENESIS RESCUE SYSTEMS tools
- Integrated functionalities
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The app for all your E-FORCE SLi battery rescue tools from GENESIS RESCUE SYSTEMS
Fuel Density Calculation
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.
- Fuel density calculations
- Compare uploaded vs. actual fuel
- Designed for Boeing and Airbus aircrews
- Accurate fuel on board (FOB) verification
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Fuel Density Calculation is a cockpit utility for comparing receipt-based fuel uplift calculations against indicated fuel on board. Enter landing fuel, fuel density or specific gravity, fuel receipt quantities, and indicated FOB. The app calculates uplift, landing fuel plus uplift, and the resulting difference in both percent and pounds. Supports gallons and liters, automatic decimal formatting, and specific gravity conversion for receipts that provide SG instead of fuel density. This app is a calculation aid and does not replace approved aircraft, company, or maintenance procedures.
Screenshots
Verdict
The clearest difference is price: E at Free against Fuel Density Calculation's $2.99. E also leads on iOS requirement (13.0 vs 17.0). On rating, ratings volume, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
E 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.
On the App Store both sit at effectively the same score — 5.0 for E against 5.0 for Fuel Density Calculation. Both are backed by a comparable volume of ratings — 2 and 2 respectively.
E ships an update every 3 months, Fuel Density Calculation every 2 months. The most recent releases landed on September 29, 2026 and September 17, 2026 respectively.
| Parameter | E | Fuel Density Calculation |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 5.0 (2 ratings) | 5.0 (2 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 2 | 2 |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 39 MB | 1 MB |
| Age rating | 17+ | 4+ |
| Developer | Rescue Digital Systems Gmbh | Richard Montoya |
Customer experience
E
Fuel Density Calculation
In-app purchases
E
No in-app purchases
Fuel Density Calculation
No in-app purchases
Questions
Is E free?
Is Fuel Density Calculation free?
Which has better reviews, E or Fuel Density Calculation?
Do E or Fuel Density Calculation have ads?
Which is updated more often, E or Fuel Density Calculation?
Other comparisons
