Comparison

Refuelling vs Simple FTL Calculator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Refuelling

This app helps pilots calculate aircraft fuel requirements with advanced error management. It allows for unlimited aircraft entries and custom parameters, providing detailed fuel chit and techlog entries. Visualizations and volumetric checks ensure accuracy and compliance.

Highlights
  • Unlimited aircraft entry
  • Custom aircraft parameters
  • Built-in error management
  • Detailed fuel chit and techlog
  • Pictorial fuel distribution view
  • Volumetric and weight checks
  • Data retention and verification
Features
Read full description

Enter as many aircraft as you like and set your own parameters! Incredibly detailed and sophisticated App with built-in error management. EASY TO USE - Ensure correct aircraft selected - Enter required ramp fuel - Enter remaining fuel - Press calculate! - Techlog and fuel chit entries will be displayed DATA RETENTION - Remembers information used - Allows subsequent data input verification, unlike a calculator UNLIMITED AIRCRAFT - Designed to allow entry of aircraft type-specific parameters for as many aircraft and variants as desired - Set default specific gravity for each aircraft for ease - Set a preference for Separate Tanks if your aircraft does not have a fuel totaliser to avoid mental addition - Elect to display 'FULL' on the fuel chit when the wing tanks are full or the actual value - Supports rounding for aircraft that refuel in 100 Kg/Lb increments when using a 3-tank arrangement - Add company-specific volumetric tolerances for each aircraft to verify fuel weight and/or volume is within prescribed limits - Only needs to be done once PICTORIAL - Once fuel requirements have been calculated, tap anywhere on the Fuel Chit section to see a pictogram of the aircraft showing fuel distribution in each tank along with total fuel required and total uplift required! VOLUMETRIC CHECK - If required, it is possible to check both fuel weight and volume are within set tolerance. ERROR MANAGEMENT - Guards against entry errors using aircraft data - Automatic Universal App. See Developer website. Designed for iPhone but works just as well on iPad.

About

Simple FTL Calculator

Features
Read full description

Stay compliant and fly safely with Simple FTL Calculator, the essential flight duty period (FDP) and target off-block time planning tool for pilots, flight attendants, and aviation operations personnel. Tired of complex FTL calculations? Simple FTL Calculator streamlines the process, helping you quickly determine maximum allowable duty times, manage split duty, and plan your departures to ensure you're always within regulatory limits. Designed by aviation professionals for aviation professionals, our app offers an intuitive, user-friendly interface for IOS. Key Features You'll Love: 1- Accurate FDP Calculations: Instantly find your maximum FDP based on report time and number of sectors. Our app uses standard time bands and allows for easy adjustments. 2- Smart Split Duty Support: Effortlessly calculate duty extensions for qualifying rest periods. The app automatically checks minimum break requirements and applies the correct extension (up to 50% of break time). 3- Target Off-Block Time Precision: Work backward from your FDP end time to determine the latest possible off-block time, factoring in flight duration and customizable post-flight duty buffers. 4- Seamless Integration: Use FDP results directly in the Target Off Block calculator or input times manually. Clear visual cues show data sources. 5- Fully Customizable: Tailor the app to your needs! Adjust pre-flight (before off-blocks) and post-flight (after on-blocks) duty timings. Edit the entire FDP reference table to match your airline’s specific opspecs, regional rules, or special approvals. 6- User-Friendly Experience: Dynamic alerts for recalculations ensure you always have the latest figures. Light/dark mode adapts to your device settings. Easily reset to default settings if needed. Offline functionality – no internet required. Who is this app for? Pilots & Flight Crew: Plan daily duties, assess impacts of delays, optimize split duty, and calculate return-to-base timings. Flight Operations Teams: Verify schedules, manage disruptions, and make informed crewing decisions. Aviation Training: A great tool for demonstrating FDP calculations and testing operational scenarios. Download Simple FTL Calculator today and take the guesswork out of flight duty limitations. Fly smarter, not harder! Feel free to contact us on support@simpleftl.com to add missing features or suggest improvements.

Screenshots

Refuelling4 screens
Simple FTL Calculator4 screens

Verdict

The call

The clearest difference is price: Simple FTL Calculator at $3.99 against Refuelling's $4.99. On update cadence, ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

Refuelling costs $4.99 and Simple FTL Calculator $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on August 3, 2026 and July 5, 2026 respectively.

Scorecard1 real difference · 9 level
Refuelling versus Simple FTL Calculator: the parameters behind the verdict, then further details
ParameterRefuellingSimple FTL Calculator
Price$4.99$3.99 — better
Rating3.0 (1 ratings) — better—
Positive reviews75.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size2 MB33 MB
Age rating4+4+
DeveloperChris GodesarYiu Leung Sze

In-app purchases

None

Refuelling

No in-app purchases

None

Simple FTL Calculator

No in-app purchases

Questions

Is Refuelling free?
Refuelling costs $4.99, with no in-app purchases.
Is Simple FTL Calculator free?
Simple FTL Calculator costs $3.99, with no in-app purchases.
Do Refuelling or Simple FTL Calculator have ads?
Neither Refuelling nor Simple FTL Calculator shows ads.
Which is updated more often, Refuelling or Simple FTL Calculator?
Refuelling ships an update every 2 months, and Simple FTL Calculator every 2 months. Most recently, Refuelling was updated on August 3, 2026 and Simple FTL Calculator on July 5, 2026.

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